080609-11 bioontologies in practice.ppt · 6/9/2008 · addison's disease occurs when the when...
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Biomedical Ontology in PracticeBiomedical Ontology in Practice
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 9June 9--11, 200811, 2008
Biomedical Ontology in PracticeBiomedical Ontology in Practice
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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ObjectivesObjectives
Learn about biomedical ontologiesLearn about biomedical ontologiesHistoryHistoryDesign principles, formalisms and toolsDesign principles, formalisms and toolsWhat are they?What are they?
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What are they used for?What are they used for?
Work with biomedical ontologiesWork with biomedical ontologiesSearchSearchAnalyzeAnalyzeExtendExtendUse for data integrationUse for data integration
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
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June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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References References BioBio--ontology coursesontology courses
Barry Smith, U. Buffalo / NCBOBarry Smith, U. Buffalo / NCBOhttp://ontology.buffalo.edu/smith/Ontology_Course.htmlhttp://ontology.buffalo.edu/smith/Ontology_Course.html
Stefan Schulz, U. Freiburg, Germany / KRStefan Schulz, U. Freiburg, Germany / KR--MED MED 2008 tutorial2008 tutorial
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http://www.krhttp://www.kr--med.org/2008/index.htmlmed.org/2008/index.html
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 5
June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Introduction to Biomedical OntologiesIntroduction to Biomedical Ontologies
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 9, 2008 June 9, 2008 –– Session #1Session #1
Introduction to Biomedical OntologiesIntroduction to Biomedical Ontologies
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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OutlineOutline
Historical perspectiveHistorical perspectiveIntroduction Introduction to biomedical terminologies through to biomedical terminologies through an examplean exampleBiomedical terms as names for biomedical classesBiomedical terms as names for biomedical classes
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Terminological relations as a surrogate for Terminological relations as a surrogate for ontological relationsontological relations
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Historical perspectiveHistorical perspectivep pp p
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Why biomedical terminologies?Why biomedical terminologies?
To support a theory of diseasesTo support a theory of diseasesTo classify diseasesTo classify diseasesTo support epidemiologyTo support epidemiologyTo index and retrieve informationTo index and retrieve information
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To index and retrieve informationTo index and retrieve informationTo serve as a referenceTo serve as a reference
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To support a theory of diseasesTo support a theory of diseases
HippocratesHippocratesDismisses superstitionDismisses superstitionFour humorsFour humors
BloodBloodPhlegmPhlegm
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PhlegmPhlegmYellow bileYellow bileBlack bileBlack bile
Thomas Sydenham (1624Thomas Sydenham (1624--1689)1689)Medical observations on the historyMedical observations on the historyand cure of acute diseasesand cure of acute diseases (1676)(1676)
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To classify diseases (and plants)To classify diseases (and plants)
Carolus Linnaeus (1707Carolus Linnaeus (1707--1778)1778)Genera PlantarumGenera Plantarum (1737)(1737)Genera MorborumGenera Morborum (1763)(1763)
FranFranççois Boissier de La Croixois Boissier de La Croix
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a.k.a. F. B. de Sauvages (1706a.k.a. F. B. de Sauvages (1706--1767)1767)Methodus FoliorumMethodus Foliorum (1751)(1751)Nosologia MethodicaNosologia Methodica (1763/68)(1763/68)
William Cullen (1710William Cullen (1710--1790)1790)Synopsis Nosologiae MethodicaeSynopsis Nosologiae Methodicae (1785)(1785)
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From plants…From plants…
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… to diseases… to diseases
Four categories (W. Cullen)Four categories (W. Cullen)FeversFeversNervous disordersNervous disordersCachexiasCachexias
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Local diseases Local diseases “The distinction of the genera of diseases, the distinction of the species of each, and often even that of the varieties, I hold to be a necessary foundation of every plan of physic, whether dogmatical or empirical.”– William Cullen, Edinburgh, 1785Synopsis Nosologia Methodicae
(Cited by Chris Chute)
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To support epidemiologyTo support epidemiology
John Graunt (1620John Graunt (1620--1674)1674)Analyzes the vital statisticsAnalyzes the vital statisticsof the citizens of Londonof the citizens of London
William Farr (1807William Farr (1807--1883)1883)
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Medical statisticianMedical statisticianImproves Cullen’s classificationImproves Cullen’s classificationContributes to creating ICDContributes to creating ICD
Jacques Berthillon (1851Jacques Berthillon (1851--1922)1922)Chief of the statistical services (Paris)Chief of the statistical services (Paris)Classification of causes of death (161 rubrics)Classification of causes of death (161 rubrics)
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London Bills of MortalityLondon Bills of Mortality
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Limitations of existing classificationsLimitations of existing classifications
“The advantages of a uniform statistical nomenclature, however imperfect, are so obvious, that it is surprising no attention has been paid to its enforcement in Bills of Mortality. Each disease has, in many instances, been denoted by three or four terms, and each term has been applied to as many different diseases: vague, inconvenient names have been employed, or complications have been registered instead of primary diseases The nomenclature is of as much importance in this
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instead of primary diseases. The nomenclature is of as much importance in this department of inquiry as weights and measures in the physical sciences, and should be settled without delay.”– William FarrFirst annual report.London, Registrar General of England and Wales, 1839, p. 99.
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To index and retrieve informationTo index and retrieve information
Biomedical literatureBiomedical literatureMEDLINE (15M citations from 4600 journals)MEDLINE (15M citations from 4600 journals)Manually indexedManually indexedMedical Subject Headings (MeSH)Medical Subject Headings (MeSH)
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GenomeGenomeModel organism databases (Fly, Mouse, Yeast, …)Model organism databases (Fly, Mouse, Yeast, …)Manually / semiManually / semi--automatically curatedautomatically curatedGene OntologyGene Ontology
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MEDLINE and MeSHMEDLINE and MeSH
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Mouse Genome Database and GOMouse Genome Database and GO
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To serve as a referenceTo serve as a reference
Reference terminology/ontologyReference terminology/ontologyUniversally neededUniversally neededDeveloped independently of any purposesDeveloped independently of any purposesReusable by many applicationsReusable by many applications
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ExamplesExamplesVA National Drug File (NDF)VA National Drug File (NDF)Foundational Model of Anatomy (FMA)Foundational Model of Anatomy (FMA)SNOMED CTSNOMED CT
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Anatomy in BiomedicineAnatomy in Biomedicine
Clinical medicinePhysiology
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Anatomy
Biomedical researchBiomedical literature
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Administrative terminologiesAdministrative terminologies
Coding patient recordsCoding patient recordsInternational Classification of Primary Care (ICPC)International Classification of Primary Care (ICPC)SNOMEDSNOMEDRead CodesRead Codes
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Reporting claims to health insurance companiesReporting claims to health insurance companiesCurrent Procedural Terminology (CPT)Current Procedural Terminology (CPT)International Classification of Diseases (ICDInternational Classification of Diseases (ICD--9 CM)9 CM)Healthcare Common Procedure Coding System Healthcare Common Procedure Coding System (HCPCS)(HCPCS)
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History of Medical OntologiesHistory of Medical Ontologies
1603 1975
ICD9
1900
ICD
18551785
SynopsisNosologiaeMethodicae MeSH
OPCSEmTree
SNOPCPT
1700
FMA
(courtesy of J. Rogers)[Bodenreider, BIB 2006]
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OPCS
SNOPCPT
MESHICD
OPCS3
CTV3READ
1975 20051985 1995
ICPCSNOMED-2
SNOMEDInternational SNOMED-RT
SNOMED-CT
GALEN DM&D
UMLS
FMA
OPCS4 OPCS4.3
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Biomedical ontology in Biomedical ontology in PubMedPubMed
800
1000
1200
1400
Number of articles in PubMed/MEDLINE on Ontology vs. Controlled vocabulary
Ontology or ontologiesBothControlled vocabulary [excluding DSM] * (*) As of
2008/02/20(Partial coverage for 2007, due to a slight lag in the indexing process)
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0
200
400
600
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007year
[Bodenreider, YBMI 2008]
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Biomedical ontologies in Biomedical ontologies in PubMedPubMed
60%
80%
100%
Proportion of citations in PubMed/MEDLINE by ontology
GO
NCI Thesaurus
UMLS
GeneOntology
GeneOntology
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0%
20%
40%
60%
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007year
FMA
UMLS
SNOMED
MeSHLOINC
UMLS
SNOMED
SNOMED
SNOMED
MeSH
MeSHMeSH
UMLS
[Bodenreider, YBMI 2008]
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Introduction to biomedicalIntroduction to biomedicalterminologies through an exampleterminologies through an example
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Guy’s Hospital, LondonGuy’s Hospital, London
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Thomas Addison (1795Thomas Addison (1795--1860)1860)
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Addison’s diseaseAddison’s disease
Addison's disease is a rare Addison's disease is a rare endocrine disorderendocrine disorderAddison's disease occurs Addison's disease occurs when the when the adrenal glandsadrenal glandsdo not produce enough of do not produce enough of
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p gp gthe hormone the hormone cortisolcortisolFor this reason, the For this reason, the disease is sometimes disease is sometimes called called chronic adrenal chronic adrenal insufficiencyinsufficiency, or , or hypocortisolismhypocortisolism
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Adrenal insufficiency Adrenal insufficiency Clinical variantsClinical variants
Primary / SecondaryPrimary / SecondaryPrimary: lesion of the Primary: lesion of the adrenal glands themselvesadrenal glands themselvesSecondary: inadequate Secondary: inadequate secretion of ACTH by the secretion of ACTH by the pituitary glandpituitary gland
ACTH
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pituitary glandpituitary gland
Acute / ChronicAcute / ChronicIsolated / Polyendocrine Isolated / Polyendocrine deficiency syndromedeficiency syndrome
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Addison’s disease: Addison’s disease: SymptomsSymptoms
FatigueFatigueWeaknessWeaknessLow blood pressureLow blood pressurePigmentation of the skin (exposed and nonPigmentation of the skin (exposed and non--
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Pigmentation of the skin (exposed and nonPigmentation of the skin (exposed and nonexposed parts of the body)exposed parts of the body)……
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AD in medical vocabulariesAD in medical vocabularies
Synonyms: Synonyms: different termsdifferent termsAddisonian syndromeAddisonian syndromeBronzed diseaseBronzed diseaseAddison melanodermaAddison melanoderma symptoms
eponym
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Asthenia pigmentosaAsthenia pigmentosaPrimary adrenal deficiencyPrimary adrenal deficiencyPrimary adrenal insufficiencyPrimary adrenal insufficiencyPrimary adrenocortical insufficiencyPrimary adrenocortical insufficiencyChronic adrenocortical insufficiencyChronic adrenocortical insufficiency
Contexts: Contexts: different hierarchiesdifferent hierarchies
clinicalvariants
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Internal Classification of DiseasesInternal Classification of Diseases
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Medical Subject HeadingsMedical Subject Headings
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SNOMED CTSNOMED CT
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Biomedical terms as namesBiomedical terms as namesfor biomedical classesfor biomedical classes
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Terms reflecting valid classesTerms reflecting valid classes
Pulmonary anthraxPulmonary anthraxBRCA1 proteinBRCA1 proteinCoronary arteryCoronary arteryCoronary artery bypassCoronary artery bypass……
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……
Non-insulin dependent diabetes mellitusNon-Hodgkin lymphomaNon-steroidal anti-inflammatory drugsNon-opioid analgesicsNon-invasive medical procedure
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IssuesIssues
Multiple terms for a classMultiple terms for a classMultiple classes for a termMultiple classes for a termPresence of nonPresence of non--ontological features in termsontological features in termsComposite termsComposite terms
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Composite termsComposite terms
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Multiple terms for a classMultiple terms for a class
SynonymySynonymy
Left coronary arteryLeft coronary arteryLCALCAArteria coronaria sinistra Arteria coronaria sinistra
Addison’s diseaseAddison’s diseasePrimary adrenocorticalPrimary adrenocorticalinsufficiency insufficiency
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“Clinical synonymy” (vs. identity)“Clinical synonymy” (vs. identity)
Abdominal swellingAbdominal swellingSwollen abdomen Swollen abdomen
Addison’s diseaseAddison’s diseasePrimary adrenocorticalPrimary adrenocorticalinsufficiency insufficiency
vs. Waterhouse-Friderichsen SyndromePosttransfusion hepatitis Posttransfusion hepatitis Posttransfusion Posttransfusion viralviral hepatitishepatitis
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Multiple classes for a termMultiple classes for a term
PolysemyPolysemy
ColdCold
ColdColdCommon coldCommon cold
ColdColdCold temperatureCold temperature
COLDCOLDChronic Obstructive Airway DiseaseChronic Obstructive Airway Disease
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Truncated termsTruncated terms
Chronic Obstructive Airway DiseaseChronic Obstructive Airway Disease
CalciumCalcium
CalciumCalciumCaCa++++
Coagulation factor IVCoagulation factor IV
CalciumCalciumCalcium measurementCalcium measurement
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NonNon--ontological features in termsontological features in terms
Epistemological featuresEpistemological features
Gallbladder calculus Gallbladder calculus without mention of cholecystitiswithout mention of cholecystitisDiarrheaDiarrhea of presumed infectious originof presumed infectious originReplacement of Replacement of unspecifiedunspecified heart valveheart valve
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Replacement of Replacement of unspecifiedunspecified heart valveheart valve……
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Ontology vs. EpistemologyOntology vs. Epistemology
OntologyOntologyInvariants in realityInvariants in reality
Classes (universals)Classes (universals)Relations between themRelations between them
Theory of realityTheory of reality
EpistemologyEpistemologyKnowledge about such Knowledge about such entitiesentities
Perception of realityPerception of reality
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Bone metastasis
Bone metastasisdiagnosed by CT scan
Bone metastasisdiagnosed by Tc99m bone scintiscan
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Composite termsComposite terms
SentenceSentence--like termslike termsSeveral classes and their relationsSeveral classes and their relationsMay contain epistemological featuresMay contain epistemological features
Tuberculosis of adrenal glandsTuberculosis of adrenal glands, tubercle bacilli not found (in sputum) by , tubercle bacilli not found (in sputum) by microscopy, but found by bacterial culturemicroscopy, but found by bacterial culture
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microscopy, but found by bacterial culturemicroscopy, but found by bacterial culture
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More composite termsMore composite terms
Nontraffic accident involving being accidentally pushed from motor vehicle, except off-road motor vehicle, while in motion, not on public highway, driver of motor vehicle injured
Determine whether the elder patient and caretaker have a functional social support network to assist the patient in performing activities of daily living and in obtaining health care, transportation, therapy, medications, community
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in obtaining health care, transportation, therapy, medications, community resource information, financial advice, and assistance with personal problems
Telephone call by a physician to patient or for consultation or medical management or for coordinating medical management with other health care professionals (eg, nurses, therapists, social workers, nutritionists, physicians, pharmacists); complex or lengthy (eg, lengthy counseling session with anxious or distraught patient, detailed or prolonged discussion with family members regarding seriously ill patient, lengthy communication necessary to coordinate complex services of several different health professionals working on different aspects of the total patient care plan)
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Terminological relations as aTerminological relations as aggsurrogate for ontological relationssurrogate for ontological relations
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IssuesIssues
Lack of explicit classificatory principleLack of explicit classificatory principleUnderspecification of the relations Underspecification of the relations Thesaurus relationsThesaurus relationsLimited depth in hierarchies “by design”Limited depth in hierarchies “by design”
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Limited depth in hierarchies by designLimited depth in hierarchies by design
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Explicit classificatory principleExplicit classificatory principle
Anatomical entity
Physicalanatomical entity
Non-physicalanatomical entity
Spatialdimension
+ -
FoundationalModel ofAnatomy
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Material physicalanatomical entity
Non-material physicalanatomical entity
Anatomicalstructure
Bodysubstance
Anat.space
Anat.surface
Anat.line
Anat.point
Mass+ -
2D 1D 0D3D
Inherent3D shape
+ -
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No explicit classificatory principleNo explicit classificatory principle
agent/cause
l ti
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location
stage in life
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1. Certain infectious and parasitic diseases2. Neoplasms3. Diseases of the blood and blood-forming organs and certain disorders involving the
immune mechanism4. Endocrine, nutritional, and metabolic diseases5. Mental and behavioral disorders6. Diseases of nervous system7. Diseases of the eye and adnexa8. Diseases of the ear and mastoid process9. Diseases of circulatory system10. Diseases of respiratory system
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11. Diseases of digestive system12. Diseases of the skin and subcutaneous tissue13. Diseases of the musculoskeletal system and connective tissue14. Diseases of the genitourinary system15. Pregnancy, childbirth, and the puerperium16. Certain conditions originating in the newborn (perinatal) period17. Congenital malformations, deformations and chromosomal abnormalities18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified19. Injury, poisoning and certain other consequences of external causes20. External causes of morbidity21. Factors influencing health status and contact with health service
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• Attribute• Body structure• Clinical finding• Context-dependent categories• Environments and geographical locations• Events• Observable entity• Organism• Pharmaceutical / biologic product
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• Physical force• Physical object• Procedure• Qualifier value• Social context• Special concept• Specimen• Staging and scales• Substance
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Fully specified relationsFully specified relations
Viral meningitis in SNOMED CT
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Underspecification of the relationsUnderspecification of the relations
Diseases
Virus diseasesCNS diseases
parent
child
isa ?
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CNS infections
CNS viral diseasesMeningitis
Viral meningitis
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Thesaurus relationsThesaurus relations
Addison’s diseaseAddison’s diseaseDue to autoDue to auto--immunity in 80% of the casesimmunity in 80% of the casesOther causes include tuberculosisOther causes include tuberculosis
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Autoimmune diseases
Addison’s disease
Autoimmune diseases
Addison’s disease
isa
Relations used to create hierarchical structuresRelations used to create hierarchical structuresvs. hierarchical relationsvs. hierarchical relations
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Accidents in MeSHAccidents in MeSH
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Limited depth in hierarchies “by design”Limited depth in hierarchies “by design”
Term identifier (code) used to record the position Term identifier (code) used to record the position in the hierarchyin the hierarchy
Limited number of digits availableLimited number of digits availableMay hide part of the structureMay hide part of the structure
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Terminologies: ICD, SNOMED, …Terminologies: ICD, SNOMED, …
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Cystic fibrosis in ICDCystic fibrosis in ICD
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CF
CFw. Pulm.
CFw. GI
Meconium ileusin CF
CFw. otherCF
CFw. Pulm.
CFw. GI
CFw. other
Meconium ileusin CF
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ConclusionsConclusions
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Conclusions Conclusions
Biomedical termsBiomedical termsreflect some aspects of biomedical realityreflect some aspects of biomedical reality
Although the primary concern of terminology is naming, not Although the primary concern of terminology is naming, not reflecting realityreflecting reality
often convey additional features (e g epistemology)often convey additional features (e g epistemology)
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often convey additional features (e.g., epistemology)often convey additional features (e.g., epistemology)
Biomedical terminology tends to offset part of the Biomedical terminology tends to offset part of the complexitycomplexity
but often reflects utilitybut often reflects utility
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Conclusions Conclusions ☺☺
Biomedical terminologies can help populate Biomedical terminologies can help populate biomedical ontologiesbiomedical ontologiesResources neededResources needed
Linguistic analysis of termsLinguistic analysis of terms
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Statistical analysis of terms in a corpus / annotation Statistical analysis of terms in a corpus / annotation database (dependence relations)database (dependence relations)Manual curationManual curation
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
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June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Design Principles, Formalisms and ToolsDesign Principles, Formalisms and Tools
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 9, 2008 June 9, 2008 –– Session #2Session #2
for Biomedical Ontologiesfor Biomedical Ontologies
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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OverviewOverview
DefinitionsDefinitionsOntologies vs. other artifactsOntologies vs. other artifactsKinds of ontologiesKinds of ontologies
Some principles of formal ontologySome principles of formal ontology
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TopTop--level categorieslevel categoriesCategories of relationshipsCategories of relationships
Formalisms and toolsFormalisms and tools
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DefinitionsDefinitions
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IntroductionIntroduction
Concept
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Symbol Object
Ogden-Richards
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DefinitionsDefinitions
The The WhatWhat questionquestionObjects in the worldObjects in the world
With their propertiesWith their propertiesWith their With their relations relations to other objectsto other objects
Also: events processes and statesAlso: events processes and states
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Also: events, processes, and statesAlso: events, processes, and statesExplicit specification of a conceptualizationExplicit specification of a conceptualization
Support software applicationsSupport software applications
Domain ontology reflectsDomain ontology reflectsUnderlying realityUnderlying realityTheory of the domainTheory of the domain
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Examples of useExamples of use
Natural language processingNatural language processingAccess to heterogeneous sources of informationAccess to heterogeneous sources of information(e.g., Semantic Web)(e.g., Semantic Web)Systems engineeringSystems engineering
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y g gy g g
InteroperabilityInteroperability
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Ontology vs. Ontology vs. other artifactsother artifacts
OntologyOntologyDefining types of things and their relationsDefining types of things and their relations
Terminology Terminology Naming things in a domainNaming things in a domain
ThTh
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ThesaurusThesaurusOrganizing things for a given purposeOrganizing things for a given purpose
ClassificationClassificationPlacing things into (arbitrary) classesPlacing things into (arbitrary) classes
Knowledge basesKnowledge basesAssertionalAssertional knowledgeknowledge
[Smith, KR-MED 2006][Chute, JAMIA 2000]
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(Controlled) Terminology(Controlled) Terminology
Objective: naming thingsObjective: naming thingsExample: Current Procedural Terminology (CPT)Example: Current Procedural Terminology (CPT)Shared understandingShared understanding
Agreement on what terms to useAgreement on what terms to use
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ggUtilityUtility--driven (arbitrary)driven (arbitrary)
Telephone call by a physician to patient or for consultation or medical management or for coordinating medical management with other health care professionals (eg, nurses, therapists, social workers, nutritionists, physicians, pharmacists); complex or lengthy (eg, lengthy counseling session with anxious or distraught patient, detailed or prolonged discussion with family members regarding seriously ill patient, lengthy communication necessary to coordinate complex services of several different health professionals working on different
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ThesaurusThesaurus
Objective: organize things for a purposeObjective: organize things for a purposee.g., information retrievale.g., information retrieval
Organization by relatednessOrganization by relatedness
Example: Medical Subject Headings (MeSH)Example: Medical Subject Headings (MeSH)
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Indexing/retrieval of biomedical articlesIndexing/retrieval of biomedical articles
Relations used in hierarchies Relations used in hierarchies vs. hierarchical relationsvs. hierarchical relations
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Thesaurus vs. ontologyThesaurus vs. ontology
Autoimmune Diseases
Addison’s disease
is generally a
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Addison s disease
Addison’s diseasedue to autoimmunity
TuberculousAddison’s disease
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ClassificationClassification
Objective: placing things into classesObjective: placing things into classesCharacteristicsCharacteristics
Single inheritance (tree)Single inheritance (tree)Idiosyncratic inclusion/exclusion criteriaIdiosyncratic inclusion/exclusion criteria
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ClassificationClassification
Characteristics (continued)Characteristics (continued)Everything must be classified, includingEverything must be classified, including
When there is no specific slot (NEC)When there is no specific slot (NEC)When there is insufficient information (NOS)When there is insufficient information (NOS)
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Knowledge Knowledge BasesBases
Objective: represent knowledge needed for a given Objective: represent knowledge needed for a given applicationapplicationExample: drug knowledge basesExample: drug knowledge basesAssertionalAssertional knowledgeknowledge
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ggVs. definitional knowledge in ontologiesVs. definitional knowledge in ontologiesOften probabilisticOften probabilistic
Examples of assertionsExamples of assertionsIndications of a drugIndications of a drugSigns and symptoms of a diseaseSigns and symptoms of a disease
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Fuzzy bordersFuzzy borders
Some ontologies also collect namesSome ontologies also collect namesFMAFMA
Some terminologies also provide formal Some terminologies also provide formal definitionsdefinitions
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SNOMED CTSNOMED CTSome terminologies/ontologies include both Some terminologies/ontologies include both definitional and definitional and assertionalassertional knowledgeknowledge
SNOMED CTSNOMED CT
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Types of resourcesTypes of resources
Lexical resourcesLexical resourcesCollections of lexical itemsCollections of lexical itemsAdditional informationAdditional information
Part of speechPart of speechSpelling variantsSpelling variants
Ontological resourcesOntological resourcesCollections ofCollections of
kinds of entities kinds of entities (substances, qualities, (substances, qualities, processes)processes)relations among themrelations among them
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Useful for Useful for entity entity recognitionrecognitionUMLS SPECIALIST UMLS SPECIALIST Lexicon, WordNetLexicon, WordNet
relations among themrelations among themUseful for Useful for relation relation extractionextractionUMLS Semantic Network, UMLS Semantic Network, BioTopBioTop
Terminological resourcesTerminological resourcesCollections lexical items + identifiersCollections lexical items + identifiers
Useful for Useful for entity resolutionentity resolutionUMLS MetathesaurusUMLS Metathesaurus
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CatalogCatalog
Thesauri:Thesauri:BT/NT,BT/NT,
Parent/Child,Parent/Child,Informal IsInformal Is--AA
Formal isFormal is--aaFrames Frames
(Properties)(Properties)Disjointness, Disjointness,
InverseInverse CYCCYCRDF(S)RDF(S)DB SchemaDB Schema
KEGGKEGGTAMBISTAMBIS
BioPAXBioPAX
OntylogOntylog
Medication ListsMedication ListsDDI ListsDDI Lists
The Knowledge Semantics ContinuumThe Knowledge Semantics Continuum
Ontology Dimensions based on McGuinness and FininOntology Dimensions based on McGuinness and Finin
SimpleSimpleTerminologiesTerminologies
ExpressiveExpressiveOntologiesOntologies
GeneralGeneralLogicalLogical
constraintsconstraints
Terms/Terms/glossaryglossary FormalFormal
instancesinstancesValue Value
RestrictionRestriction
MeSH,MeSH,Gene Ontology,Gene Ontology,UMLS MetaUMLS Meta
IEEE SUOIEEE SUOOWLOWL
EcoCycEcoCyc
Snomed
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Kinds of ontologiesKinds of ontologies
Upper Level Ontology
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Domain Ontology
GeneralOntology
Application ontologies
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OntologyOntology--related issuesrelated issues
CreationCreationMergingMergingAlignmentAlignmentValidationValidation
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ValidationValidation
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Formal Ontological PrinciplesFormal Ontological Principlesg pg p
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Formal ontological distinctionsFormal ontological distinctions
Universal vs. individualUniversal vs. individualContinuant vs. Continuant vs. occurentoccurentIndependent vs. dependentIndependent vs. dependent
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Universal vs. IndividualUniversal vs. Individual
Universal = Universal = categorycategorySynonymsSynonyms
Kind, Type, (Class)Kind, Type, (Class)
ExamplesExampleseyeballeyeball
Individual = Individual = instanceinstanceSynonymsSynonyms
Particular, TokenParticular, Token
ExamplesExamplesmy right eyeballmy right eyeball
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eyeballeyeballblood pressureblood pressureconferenceconference
my right eyeballmy right eyeballmy blood pressure (132/79)my blood pressure (132/79)AMIA Annual Symposium AMIA Annual Symposium 20032003
instantiation
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Continuant vs. OccurrentContinuant vs. Occurrent
Continuant = Continuant = Continues to Continues to exist through timeexist through timeSynonymsSynonyms
SubstanceSubstance
ExamplesExamples
Occurrent = Occurrent = UnfoldsUnfoldsthroughthrough timetimeSynonymsSynonyms
ProcessProcess
ExamplesExamples
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ExamplesExamplestennis racquettennis racquetmitochondrionmitochondrioninsulin productioninsulin production
ExamplesExamplestennis tennis tournamenttournamentmetabolismmetabolismproducingproducing insulininsulin
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Independent vs. DependentIndependent vs. Dependent
Independent = Independent = Can exist Can exist without support from without support from other entitiesother entitiesExamplesExamples
virusvirus
Dependent = Dependent = Require Require support from other entities support from other entities for its existencefor its existenceExamplesExamples
viral infectionviral infection
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moleculemoleculeplantplant
DNA bindingDNA bindingfoodfood
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Formal ontology Formal ontology Upper levelUpper level
ThingThing
ContinuantContinuant OccurentOccurentUniversalsUniversals(classes)(classes)
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IndependentIndependentcontinuantcontinuant
DependentDependentcontinuantcontinuant
ParticularsParticulars(instances)(instances)
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Formal ontological distinctionsFormal ontological distinctions
Basic distinctions in many topBasic distinctions in many top--level ontologieslevel ontologiesGeneric: BFO, DOLCEGeneric: BFO, DOLCEBiomedical: Biomedical: BioTopBioTop, UMLS Semantic Network, UMLS Semantic Network
Condition the relations between various types of Condition the relations between various types of
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entitiesentitiesRelationsRelations
Between instances (e.g., Between instances (e.g., part_ofpart_of [at time])[at time])Between classes (e.g., Between classes (e.g., isaisa, , part_ofpart_of [[atemporalatemporal])])Between one instance and one class (Between one instance and one class (instance_ofinstance_of))
[Smith, Genome Biology 2005]
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Formal ontology in practiceFormal ontology in practice
Provides foundational classes and relationsProvides foundational classes and relationsUpper level ontologiesUpper level ontologiesRelation ontologyRelation ontology
Provides a framework for analyzing entities and Provides a framework for analyzing entities and
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relationsrelations
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ExamplesExamplespp
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General ontologiesGeneral ontologies
OpenCycOpenCycGeneral ontologyGeneral ontologyCycorpCycorp, Inc (D. , Inc (D. LenatLenat & al.)& al.)Over 1M handOver 1M hand--coded assertionscoded assertionshttp://www.opencyc.orghttp://www.opencyc.org
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http://www.opencyc.orghttp://www.opencyc.org
WordNetWordNetElectronicElectronic lexical lexical databasedatabasePrinceton Princeton UniversityUniversity (G. Miller & al.)(G. Miller & al.)Over 100,000 Over 100,000 synsetssynsetshttp://wordnet.princeton.edu/http://wordnet.princeton.edu/
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Top level in OpenCycTop level in OpenCyc
Thing
IndividualIntangible
Intangible individual
PartiallyTangible
Mathematical or Tangible thing
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Intangible individualcomputational thing
Set or collection
Collection
Tangible thing
#$genls
#$isa
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Top level in WordNetTop level in WordNet
AbstractionActivityEntityEventGroup
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LocationNatural phenomenonPossessionPsychological featureShapeState
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GALENGALEN
GeneralisedGeneralised Architecture for Architecture for LanguagesLanguages, , EncyclopaediasEncyclopaedias, and Nomenclatures in , and Nomenclatures in MedicineMedicineEuropeanEuropean Union Union projectproject (A. (A. RectorRector & al.)& al.)Over 25,000 concepts (primitives)Over 25,000 concepts (primitives)
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p (p )p (p )http://www.opengalen.orghttp://www.opengalen.org
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Top level in GALENTop level in GALEN
DomainCategory
Phenomenon ModifierConceptArbitrarilyConjuncted
Phenomenon
GeneralisedStructure U it
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GeneralisedProcess
GeneralisedSubstance
SubstanceOrPhysicalStructure
Role
Unit
Modality
Aspect
SelectorStatusStateOrQuantity
Feature
Collection
GeneralLevelOfSpecification
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UMLS Semantic NetworkUMLS Semantic Network
Definitional knowledge in the biomedical domainDefinitional knowledge in the biomedical domainNLM (A. McCray & al.)NLM (A. McCray & al.)ContentContent
135 semantic types135 semantic types
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ypyp54 types of relationship54 types of relationship6700 semantic relations6700 semantic relations
http://semanticnetwork.nlm.nih.govhttp://semanticnetwork.nlm.nih.gov
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Top level in the Semantic NetworkTop level in the Semantic Network
Root
Entity Event
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Conceptual Entity Physical object Activity Phenomenon or Process
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Differences between ontologiesDifferences between ontologiesgg
ExamplesExamples
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Granularity, plesionymyGranularity, plesionymy
WordNetUMLS
generalized epilepsygrand mal epilepsy
Epilepsy, GeneralizedSeizure Disorder, Generalized[…]
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grand mal epilepsy
Epilepsy, Grand MalTonic-Clonic EpilepsySeizure Disorder, Tonic Clonic[…]
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Differing categorizationDiffering categorizationWordNetUMLS
natural process
process
phenomenon
Pathologic Function
Biologic Function
Natural Phenomenon or Process
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cavitycariesdental cariestooth decay
Dental CariesDental cavity, NOSTooth cariesDental Decay[…]
Dental Caries
decay
p
Disease or Syndrome
at o og c u ct o
Healthdisorder
Healthdisorder
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Formalisms and ToolsFormalisms and Tools
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Ontology and FormalismOntology and Formalism
FramesFramesDescription logicsDescription logics
OWL DLOWL DLFirstFirst--order logicorder logic
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gg
OBO FormatOBO FormatConversion to OWL DLConversion to OWL DL
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Tools for ontology developersTools for ontology developers
ProtégéProtégéPublicly availablePublicly availableFrames and DLFrames and DLClassifierClassifierSupports many file formats (import/export)Supports many file formats (import/export)
http://protege.stanford.edu/
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Large community of usersLarge community of usersWell supportedWell supportedhttp://protege.stanford.edu/http://protege.stanford.edu/
OBOOBO--EditEditSpecific to the biomedical/OBO communitySpecific to the biomedical/OBO communitySimpler than Protégé (“tool for biologists”)Simpler than Protégé (“tool for biologists”)http://oboedit.org/http://oboedit.org/
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
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June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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“High“High--Impact” Biomedical OntologiesImpact” Biomedical Ontologies
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 9, 2008 June 9, 2008 –– Session #3Session #3
A Structural PerspectiveA Structural Perspective
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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OverviewOverview
Structural perspectiveStructural perspectiveWhat are they (vs. what are they for)?What are they (vs. what are they for)?
“High“High--impact” biomedical ontologiesimpact” biomedical ontologiesInternational Classification of Diseases (ICD)International Classification of Diseases (ICD)Logical Observation Identifiers, Names and Codes (LOINC)Logical Observation Identifiers, Names and Codes (LOINC)
[J. Cimino, YBMI 2006]
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g , ( )g , ( )SNOMED Clinical TermsSNOMED Clinical TermsFoundational Model of AnatomyFoundational Model of AnatomyGene OntologyGene OntologyRxNormRxNormMedical Subject Headings (MeSH)Medical Subject Headings (MeSH)NCI ThesaurusNCI ThesaurusUnified Medical Language System (UMLS)Unified Medical Language System (UMLS)
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International Classification of International Classification of DiseasesDiseases
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ICD ICD Characteristics (1)Characteristics (1)
Current version: ICDCurrent version: ICD--1010Type: ClassificationType: ClassificationDomain: DisordersDomain: DisordersDeveloper: World Health Organization (WHO)Developer: World Health Organization (WHO)
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Developer: World Health Organization (WHO)Developer: World Health Organization (WHO)Funding: WHOFunding: WHOAvailabilityAvailability
Publicly available: NoPublicly available: NoRepositories: UMLS [ICD9Repositories: UMLS [ICD9--CM in NCBO CM in NCBO BioPortalBioPortal]]
URL: URL: http://www.who.int/classifications/icd/en/http://www.who.int/classifications/icd/en/
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ICD ICD Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 12,318Concepts: 12,318Terms: 1 per concept (tabular)Terms: 1 per concept (tabular)
Major organizing principles:Major organizing principles:
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Tree (single inheritance hierarchy)Tree (single inheritance hierarchy)No explicit classification criteriaNo explicit classification criteria
Idiosyncratic inclusion/exclusion mechanismIdiosyncratic inclusion/exclusion mechanism
.8 slots for Not elsewhere classified (NEC).8 slots for Not elsewhere classified (NEC)
.9 slots for Not otherwise specified (NOS).9 slots for Not otherwise specified (NOS)
Formalism: Proprietary formatFormalism: Proprietary format
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ICD ICD Top levelTop level
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ICD ICD ExampleExample
Idiosyncratic inclusion/exclusion criteriaIdiosyncratic inclusion/exclusion criteria
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ICD ICD ExampleExample
Not elsewhere classified (NEC)Not elsewhere classified (NEC)Not otherwise specified (NOS)Not otherwise specified (NOS)
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Logical Observation Identifiers, Logical Observation Identifiers, g ,g ,Names and Codes (LOINC)Names and Codes (LOINC)
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LOINC LOINC Characteristics (1)Characteristics (1)
Current version: 2.22 (Dec. 2007)Current version: 2.22 (Dec. 2007)Type: Controlled terminology*Type: Controlled terminology*Domain: Laboratory and clinical observationsDomain: Laboratory and clinical observationsDeveloper:Developer: RegenstriefRegenstrief InstituteInstitute
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Developer: Developer: RegenstriefRegenstrief InstituteInstituteFunding: NLMFunding: NLMAvailabilityAvailability
Publicly available: YesPublicly available: YesRepositories: UMLSRepositories: UMLS
URL: URL: www.regenstrief.org/loinc/loinc.htmwww.regenstrief.org/loinc/loinc.htm
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LOINC LOINC Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 50k active codes (2.18)Concepts: 50k active codes (2.18)Terms: n/a*Terms: n/a*
Major organizing principles:Major organizing principles:No hierarchical structure among the main codesNo hierarchical structure among the main codes66
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6 axes6 axesComponent (analyte [+ challenge] [+ adjustments])Component (analyte [+ challenge] [+ adjustments])PropertyPropertyTimingTimingSystemSystemScaleScale[Method][Method]
Formalism: “DLFormalism: “DL--like”like”
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LOINC LOINC ExampleExample
Sodium:SCnc:-Pt:SerSodium:SCnc:-Pt:Ser//Plas:QnPlas:Qn[the molar concentration of sodium is measured in [the molar concentration of sodium is measured in the plasma (or serum), with quantitative result]the plasma (or serum), with quantitative result]
Axis Value
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Axis ValueComponent Sodium
Property SCnc – Substance Concen-tration (per volume)
Timing Pt – Point in time (Random)
System Ser/Plas – Serum or Plasma
Scale Qn – Quantitative
Method --
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SNOMED Clinical TermsSNOMED Clinical Terms
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SNOMED CT SNOMED CT Characteristics (1)Characteristics (1)
Current version: January 31, 2008 (2 annual Current version: January 31, 2008 (2 annual releases)releases)Type: Reference terminology / ontologyType: Reference terminology / ontologyDomain: Clinical medicineDomain: Clinical medicineD l IHTSDOD l IHTSDO
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Developer: IHTSDODeveloper: IHTSDOFunding: IHTSDOFunding: IHTSDOAvailabilityAvailability
Publicly available: Yes* (in member countries)Publicly available: Yes* (in member countries)RepositoriesRepositories: UMLS: UMLS
URL: URL: http://www.ihtsdo.org/http://www.ihtsdo.org/
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SNOMED CT SNOMED CT Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 311,313 active concepts (Jan. 31, 2008)Concepts: 311,313 active concepts (Jan. 31, 2008)Terms: 794,061 active “descriptions”Terms: 794,061 active “descriptions”
Major organizing principles:Major organizing principles:
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Utility for clinical medicine (e.g., Utility for clinical medicine (e.g., assertionalassertional + + definitional knowledge)definitional knowledge)Model of meaning (incomplete)Model of meaning (incomplete)Rich set of associative relationshipsRich set of associative relationshipsSmall proportion of defined concepts (many primitives)Small proportion of defined concepts (many primitives)
Formalism: Description logics (KRSS)Formalism: Description logics (KRSS)
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SNOMED CT SNOMED CT Top levelTop level
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SNOMED CT SNOMED CT ExampleExample
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Foundational Model of AnatomyFoundational Model of Anatomyyy
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FMA FMA Characteristics (1)Characteristics (1)
Current version: ? (no fixed release schedule)Current version: ? (no fixed release schedule)Type: OntologyType: OntologyDomain: Anatomy (anatomical structures)Domain: Anatomy (anatomical structures)Developer: U. Washington, Department of Developer: U. Washington, Department of Bi l i l SBi l i l S
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Biological StructureBiological StructureFunding: NLM (grants and contract) and othersFunding: NLM (grants and contract) and othersAvailabilityAvailability
Publicly available: YesPublicly available: YesRepositories: [UMLS] / OBO / NCBO Repositories: [UMLS] / OBO / NCBO BioPortalBioPortal
URL: URL: http://fma.biostr.washington.edu/http://fma.biostr.washington.edu/
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FMA FMA Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: ~72kConcepts: ~72kTerms: ~1.5 / conceptTerms: ~1.5 / concept
Major organizing principles:Major organizing principles:Explicit classificatory criteriaExplicit classificatory criteria
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Explicit classificatory criteriaExplicit classificatory criteriaDistinct Distinct isaisa and and part_ofpart_of hierarchieshierarchiesAdditional spatial relations (e.g., adjacency)Additional spatial relations (e.g., adjacency)Multiple levels of granularity (organism to subMultiple levels of granularity (organism to sub--cellular)cellular)
Formalism: Frames (Protégé)Formalism: Frames (Protégé)Conversion to OWL Full and OWL DL availableConversion to OWL Full and OWL DL available
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FMA FMA Top levelTop level(Courtesy of C. Rosse)
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FMA FMA ExampleExample(Courtesy of C. Rosse)
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Gene OntologyGene Ontologygygy
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Gene Ontology Gene Ontology Characteristics (1)Characteristics (1)
Current version: n/a (daily/monthly releases)Current version: n/a (daily/monthly releases)Type: Controlled vocabularyType: Controlled vocabularyDomain: Molecular biologyDomain: Molecular biologyDeveloper: GO ConsortiumDeveloper: GO Consortium
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Developer: GO ConsortiumDeveloper: GO ConsortiumFunding: NIH (grants)Funding: NIH (grants)AvailabilityAvailability
Publicly available: YesPublicly available: YesRepositories: UMLS / OBO / NCBO Repositories: UMLS / OBO / NCBO BioPortalBioPortal
URL: URL: http://www.geneontology.org/http://www.geneontology.org/
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Gene Ontology Gene Ontology Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 22,546 (Jan. 2, 2007)Concepts: 22,546 (Jan. 2, 2007)Terms: 2.15 per conceptTerms: 2.15 per concept
Major organizing principles:Major organizing principles:3 major hierarchies3 major hierarchies
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3 major hierarchies3 major hierarchiesMolecular functionMolecular functionCellular componentCellular componentBiological processBiological process
Relations (within hierarchies): Relations (within hierarchies): isaisa, , part_ofpart_of, regulates, regulatesNo relations between concepts across hierarchiesNo relations between concepts across hierarchies
Formalism: OBO formatFormalism: OBO format
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Gene Ontology Gene Ontology Top level (MF)Top level (MF)
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Gene Ontology Gene Ontology Top level (CC)Top level (CC)
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Gene Ontology Gene Ontology Top level (BP)Top level (BP)
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Gene Ontology Gene Ontology ExampleExample
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RxNormRxNorm
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RxNorm RxNorm Characteristics (1)Characteristics (1)
Current version: June 2, 2007 (monthly releases)Current version: June 2, 2007 (monthly releases)Type: Controlled terminologyType: Controlled terminologyDomain: Drug namesDomain: Drug namesDeveloper: NLMDeveloper: NLM
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Developer: NLMDeveloper: NLMFunding: NLMFunding: NLMAvailabilityAvailability
Publicly available: Yes*Publicly available: Yes*Repositories: UMLSRepositories: UMLS
URL: URL: http://www.nlm.nih.gov/research/umls/rxnorm/http://www.nlm.nih.gov/research/umls/rxnorm/
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RxNorm RxNorm Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 93kConcepts: 93kTerms: 105kTerms: 105k
Major organizing principles:Major organizing principles:Generic vs brandGeneric vs brand
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Generic vs. brandGeneric vs. brandCombinations of Ingredient / Form / DoseCombinations of Ingredient / Form / DoseNo hierarchical structureNo hierarchical structureLinks to all major US drug information sourcesLinks to all major US drug information sourcesNo clinical informationNo clinical information
Formalism: UMLS RRF formatFormalism: UMLS RRF format
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RxNorm RxNorm Normalized Normalized formform
IngredientStrength
Strength
4mg/ml
Ingredient
Fluoxetine
Dose form
Oral Solution
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Dose formIngredient
IngredientStrength Dose form
Semantic clinical drug component
Semantic clinical drug
Semantic clinical drug form
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Rx Norm Rx Norm Generic Generic vs.vs. BrandBrand
GenericGenericIngredientIngredient(IN)(IN)Clinical drug formClinical drug form(SCDF)(SCDF)Cli i l dCli i l d
BrandBrandBrand nameBrand name(BN)(BN)Branded drug formBranded drug form(SBDF)(SBDF)B d d dB d d d
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Clinical drug componentClinical drug component(SCDC)(SCDC)Clinical drugClinical drug(SCD)(SCD)
Branded drug componentBranded drug component(SBDC)(SBDC)Branded drugBranded drug(SBD)(SBD)
tradename_of
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RxNorm RxNorm Relations Relations among drug entitiesamong drug entities
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Medical Subject Headings (MeSH)Medical Subject Headings (MeSH)j g ( )j g ( )
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MeSH MeSH Characteristics (1)Characteristics (1)
Current version: 2008 (yearly releases)Current version: 2008 (yearly releases)Type: Thesaurus / Controlled vocabularyType: Thesaurus / Controlled vocabularyDomain: BiomedicineDomain: BiomedicineDeveloper: NLMDeveloper: NLM
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Developer: NLMDeveloper: NLMFunding: NLM (Library Operations)Funding: NLM (Library Operations)AvailabilityAvailability
Publicly available: YesPublicly available: YesRepositories: UMLS / NCBO Repositories: UMLS / NCBO BioPortalBioPortal
URL: URL: http://www.nlm.nih.gov/mesh/http://www.nlm.nih.gov/mesh/
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MeSH MeSH Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 24,767 descriptors (2007)Concepts: 24,767 descriptors (2007)Terms: 7.5 per descriptorTerms: 7.5 per descriptor
Major organizing principles:Major organizing principles:
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Descriptor + entry termsDescriptor + entry terms(also: Qualifiers, Supplementary concepts)(also: Qualifiers, Supplementary concepts)Thesaurus relations (RB/RN/RO)Thesaurus relations (RB/RN/RO)
Formalism: Thesaurus / Proprietary XML DTDFormalism: Thesaurus / Proprietary XML DTD
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MeSH MeSH Top levelTop level
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MeSH MeSH Example (terms)Example (terms)
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MeSH MeSH Example (hierarchies)Example (hierarchies)
Polycyclic CompoundsPolycyclic Compounds
SteroidsSteroids
Hormones, Hormone Substitutes, and Hormone AntagonistsHormones, Hormone Substitutes, and Hormone Antagonists
HormonesHormones
Chemicals and DrugsChemicals and Drugs
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PregnanesPregnanes
PregnenesPregnenes
PregnenedionesPregnenediones
HydrocortisoneHydrocortisone
Adrenal Cortex HormonesAdrenal Cortex Hormones
HydroxycorticosteroidsHydroxycorticosteroids
1111--HydroxycorticosteroidsHydroxycorticosteroids 1111--HydroxycorticosteroidsHydroxycorticosteroids
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NCI ThesaurusNCI Thesaurus
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NCI thesaurus NCI thesaurus Characteristics (1)Characteristics (1)
Current version: 08.04d (~monthly releases)Current version: 08.04d (~monthly releases)Type: Controlled terminology / ontologyType: Controlled terminology / ontologyDomain: CancerDomain: CancerDeveloper: NCI Center for BioinformaticsDeveloper: NCI Center for Bioinformatics
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Developer: NCI Center for BioinformaticsDeveloper: NCI Center for BioinformaticsFunding: NCIFunding: NCIAvailabilityAvailability
Publicly available: YesPublicly available: YesRepositories: UMLS / OBO / NCBO Repositories: UMLS / OBO / NCBO BioPortalBioPortal
URL: URL: http://nciterms.nci.nih.gov/http://nciterms.nci.nih.gov/
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NCI thesaurus NCI thesaurus Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 58,868 (2007_05E)Concepts: 58,868 (2007_05E)Terms: 2.68 per conceptTerms: 2.68 per concept
Major organizing principles:Major organizing principles:
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SubsumptionSubsumption hierarchyhierarchyRich set of associative relationshipsRich set of associative relationshipsSmall proportion of defined concepts (many primitives)Small proportion of defined concepts (many primitives)Links to many external resourcesLinks to many external resources
Formalism: OWL Formalism: OWL LiteLite
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NCI thesaurus NCI thesaurus Top levelTop level
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NCI thesaurus NCI thesaurus ExampleExample
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Unified Medical Language System Unified Medical Language System g g yg g y(UMLS)(UMLS)
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UMLS UMLS Characteristics (1)Characteristics (1)
Current version: 2008AA (2Current version: 2008AA (2--3 annual releases)3 annual releases)Type: Terminology integration systemType: Terminology integration systemDomain: BiomedicineDomain: BiomedicineDeveloper: NLMDeveloper: NLM
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Developer: NLMDeveloper: NLMFunding: NLM (intramural)Funding: NLM (intramural)AvailabilityAvailability
Publicly available: Yes* (costPublicly available: Yes* (cost--free license required)free license required)Repositories: UMLSRepositories: UMLS
URL: URL: http://umlsks.nlm.nih.gov/http://umlsks.nlm.nih.gov/
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UMLS UMLS Characteristics (2)Characteristics (2)
Number ofNumber ofConcepts: 1.5M (2008AA)Concepts: 1.5M (2008AA)Terms: ~6MTerms: ~6M
Major organizing principles (Metathesaurus):Major organizing principles (Metathesaurus):
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Concept orientationConcept orientationSource transparencySource transparencyMultiMulti--lingual through translationlingual through translation
Formalism: Proprietary format (RRF)Formalism: Proprietary format (RRF)
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UMLS UMLS Integrating Integrating subdomainssubdomains
Geneticknowledge bases
OMIM
Clinicalrepositories
SNOMED CTOthersubdomains
…
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Biomedicalliterature
MeSH
Genomeannotations
GOModelorganisms
NCBITaxonomy
…
Anatomy
FMA
UMLS
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Metathesaurus
AnatomicalStructure
Fully FormedAnatomical
StructureEmbryonicStructure
Body Part, Organ orOrgan Component Pharmacologic
Substance
Disease orSyndrome
PopulationGroup
Semantic Types
SemanticNetwork
Heart
Concepts
38
237
49
5
16
13 22
Esophagus
Left PhrenicNerve
HeartValves
FetalHeart
Medias-tinum
SaccularViscus
AnginaPectoris
CardiotonicAgents
TissueDonors
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Addison’s Disease: Addison’s Disease: ConceptConceptADRENAL INSUFFICIENCY (ADDISON'S DISEASE) ADRENOCORTICAL INSUFFICIENCY, PRIMARY FAILURE Hypoadrenalisms, PrimaryMelasma addisonii Primary adrenal deficiency Asthenia pigmentosa Bronzed disease Insufficiency, adrenal primary Primary adrenocortical insufficiency Addison's, disease
Disease or Syndrome
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Addison’s Disease
C0001403
Maladie d'Addison - FrenchAddison-Krankheit - GermanMorbo di Addison - ItalianDoença de Addison - PortugueseАДДИСОНОВА БОЛЕЗНЬ - Russianアジソン病 - Japanese
An adrenal disease characterized by the progressive destruction of the adrenal cortex, resulting in insufficient production of aldosterone and hydrocortisone. Clinical symptoms include anorexia; nausea; weight loss; muscle ewakness; and hyperpigmentation of the skin due to increase in circulating levels of ACTH precursor hormone which stimulates melanocytes.
SNOMED CTSNOMED IntlMeSHMedDRA…
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Metathesaurus Metathesaurus ConceptsConcepts
ConceptConcept (~ 1.4M)(~ 1.4M) CUICUISet of synonymousSet of synonymousconcept namesconcept names
TermTerm (~ 5.3 M)(~ 5.3 M) LUILUI
(2007AB)
S0046855
A0066007 Headaches (MedDRA)A12003304 Headaches (OMIM)
S0046854
A0066000 Headache (MeSH)A0065992 Headache (ICD-10)
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Set of normalized namesSet of normalized names
StringString (~ 5.9M)(~ 5.9M) SUISUIDistinct concept nameDistinct concept name
AtomAtom (~ 7.2M)(~ 7.2M) AUIAUIConcept nameConcept namein a given sourcein a given source
L0018681
L0380797
C0018681
S0046855
S0475647A0540936 Cephalodynia (MeSH)
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RecapRecapName Scope # concepts Median Subs. Hier Version
SNOMED CT Clinical medicine(patient records) 310,314 2 yes July 31, 2007
LOINC Clinical observations and laboratory tests 46,406 3 no
Version 2.21(no “natural language” names)
FMA Human anatomical structures ~72,000 ? yes (not yet in the UMLS)
G O l Functional annotation 22 46 1 2 200
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Gene Ontology Functional annotation of gene products 22,546 1 yes Jan. 2, 2007
RxNorm Standard names for prescription drugs 93,426 1 no Aug. 31, 2007
NCI ThesaurusCancer research, clinical care, public information
58,868 2 yes 2007_05E
ICD-10Diseases and conditions(health statistics)
12,318 1 no 1998 (tabular)
MeSHBiomedicine (descriptors for indexing the literature)
24,767 5 no Aug. 27, 2007
UMLS .Terminology integration in the life sciences
1,4 M 2 n/a 2007AC (English only)
[Bodenreider, YBMI 2008]
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
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June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Biomedical Ontologies in ActionBiomedical Ontologies in Action
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 9, 2008 June 9, 2008 –– Session #4Session #4
A Functional Perspective on Biomedical OntologiesA Functional Perspective on Biomedical Ontologies
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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OverviewOverview
Functional perspectiveFunctional perspectiveWhat are they for (vs. what are they)?What are they for (vs. what are they)?
“High“High--impact” biomedical ontologiesimpact” biomedical ontologies3 major categories of use3 major categories of use
[Bodenreider, YBMI 2008]
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Knowledge management Knowledge management (indexing and retrieval of data and (indexing and retrieval of data and information, access to information, mapping among information, access to information, mapping among ontologies)ontologies)Data integrationData integration, exchange and semantic interoperability, exchange and semantic interoperabilityDecision support and reasoning Decision support and reasoning (data selection and (data selection and aggregation, decision support, natural language processing aggregation, decision support, natural language processing applications, knowledge discovery).applications, knowledge discovery).
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Knowledge managementKnowledge managementg gg g
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Knowledge managementKnowledge managementg gg g
Annotating data and resourcesAnnotating data and resources
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Terminology in ontologyTerminology in ontology
Ontology as a source of vocabularyOntology as a source of vocabularyList of names for the entities in the ontologyList of names for the entities in the ontology(ontology vs. terminology)(ontology vs. terminology)
Most ontologies have some sort of terminological Most ontologies have some sort of terminological
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componentcomponentExceptions: GALEN, LOINCExceptions: GALEN, LOINC
Not all surface forms representedNot all surface forms representedOften insufficient for NLP applicationsOften insufficient for NLP applicationsLarge variation in number of terms per concept across Large variation in number of terms per concept across ontologiesontologies
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Annotating dataAnnotating data
Gene OntologyGene OntologyFunctional annotation of gene productsFunctional annotation of gene productsin several dozen model organismsin several dozen model organisms
Various communities use the same controlled Various communities use the same controlled b l ib l i
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vocabulariesvocabulariesEnabling comparisons across model organismsEnabling comparisons across model organismsAnnotationsAnnotations
Assigned manually by curatorsAssigned manually by curatorsInferred automatically (e.g., from sequence similarity)Inferred automatically (e.g., from sequence similarity)
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GO GO Annotations for Aldh2 (mouse)Annotations for Aldh2 (mouse)
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http:// www.informatics.jax.org/
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GO GO ALD4 in YeastALD4 in Yeast
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http://db.yeastgenome.org/
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GO GO Annotations for ALDH2 (Human)Annotations for ALDH2 (Human)
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http://www.ebi.ac.uk/GOA/
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Indexing the biomedical literatureIndexing the biomedical literature
MeSHMeSHUsed for indexing and retrievalUsed for indexing and retrievalof the biomedical literature (MEDLINE)of the biomedical literature (MEDLINE)
IndexingIndexing
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Performed manually by human indexersPerformed manually by human indexersWith help of semiWith help of semi--automatic systems (suggestions)automatic systems (suggestions)e.g., Indexing Initiative at NLMe.g., Indexing Initiative at NLM
Automatic indexing systemsAutomatic indexing systems
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MeSH MeSH MEDLINE indexingMEDLINE indexing
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MeSH MeSH MEDLINE indexingMEDLINE indexing
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MeSH MeSH MEDLINE indexingMEDLINE indexing
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MeSH MeSH MEDLINE indexingMEDLINE indexing
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ICD9ICD9--CM CM Coding clinical dataCoding clinical data
ICD9ICD9--CMCMUsed for coding clinical dataUsed for coding clinical datae.g., for billing purposese.g., for billing purposes
Other uses of ICDOther uses of ICD
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Morbidity and mortalityMorbidity and mortalityreporting worldwidereporting worldwide
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Knowledge managementKnowledge managementg gg g
Accessing biomedical informationAccessing biomedical information
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Resources for biomedical search enginesResources for biomedical search engines
SynonymsSynonymsHierarchical relationsHierarchical relationsHighHigh--level categorizationlevel categorizationCoCo--occurrence informationoccurrence information
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CoCo occurrence informationoccurrence informationTranslationTranslation
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MeSH “synonyms” MeSH “synonyms” MEDLINE retrievalMEDLINE retrieval
MeSH entry termsMeSH entry termsUsed as equivalent terms for retrieval purposesUsed as equivalent terms for retrieval purposesNot always synonymousNot always synonymous
Increase recall without hurting precisionIncrease recall without hurting precision
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MeSH “synonyms” MeSH “synonyms” MEDLINE retrievalMEDLINE retrieval
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MeSH hierarchies MeSH hierarchies MEDLINE retrievalMEDLINE retrieval
MeSH “explosion”MeSH “explosion”Search for a given MeSH termSearch for a given MeSH termand all its descendantsand all its descendantsA search on Adrenal insufficiencyA search on Adrenal insufficiencyalso retrieves articles indexed withalso retrieves articles indexed with
Adrenal insufficiency
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also retrieves articles indexed withalso retrieves articles indexed withAddison diseaseAddison disease Addison disease
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…
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CoCo--indexingindexing
http://www.gopubmed.com/
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Knowledge managementKnowledge managementg gg g
Mapping across biomedical ontologiesMapping across biomedical ontologies
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Reusing informationReusing information
Clinical information coded with SNOMED CTClinical information coded with SNOMED CTMapped to ICD9Mapped to ICD9--CM and CPT for billing purposesCM and CPT for billing purposesMapped to ICDMapped to ICD--O for epidemiology purposesO for epidemiology purposes
Existing mapping tables crated by terminology Existing mapping tables crated by terminology
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developers as an incentive to use SNOMED CTdevelopers as an incentive to use SNOMED CT
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Reusing toolsReusing tools
For noun phrases extracted from medical texts, For noun phrases extracted from medical texts, map to UMLS conceptsmap to UMLS conceptsThen, select from the MeSH vocabulary the Then, select from the MeSH vocabulary the concepts that are the most closely related to the concepts that are the most closely related to the
[Aronson & al., AMIA, 2000]
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original conceptsoriginal concepts
Medical text
MetaMap
UMLS
MeSH descriptor
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Terminology integration systemsTerminology integration systems
Terminology integration systems (UMLS, Terminology integration systems (UMLS, RxNorm) help bridge across vocabulariesRxNorm) help bridge across vocabulariesUsesUses
Information integrationInformation integration
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Ontology alignmentOntology alignmentMedication reconciliationMedication reconciliation
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Integrating subdomainsIntegrating subdomains
Geneticknowledge bases
OMIM
Clinicalrepositories
SNOMED CTOthersubdomains
…
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Biomedicalliterature
MeSH
Genomeannotations
GOModelorganisms
NCBITaxonomy
…
Anatomy
FMA
UMLS
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Integrating subdomainsIntegrating subdomains
Geneticknowledge bases
Clinicalrepositories
Othersubdomains
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Biomedicalliterature
Genomeannotations
Modelorganisms
Anatomy
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TransTrans--namespace integrationnamespace integration
Geneticknowledge bases
OMIMOther
subdomains
…
Addison's disease (363732003)
Clinicalrepositories
SNOMED CT
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Genomeannotations
GOModelorganisms
NCBITaxonomy
…
Anatomy
FMA
UMLSAddison Disease (D000224)
Biomedicalliterature
MeSHUMLSC0001403
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Data integration, exchange and Data integration, exchange and g , gg , gsemantic interoperabilitysemantic interoperability
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Data integration, exchange and Data integration, exchange and g , gg , gsemantic interoperabilitysemantic interoperability
Information exchangeInformation exchangeand semantic operabilityand semantic operability
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“Standards”“Standards”
Ontologies help standardize patients dataOntologies help standardize patients dataFacilitate the exchange of data across institutionsFacilitate the exchange of data across institutionsHelp connect “islands of data” (silos)Help connect “islands of data” (silos)
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LOINCLOINCExchange of laboratory dataExchange of laboratory dataIn conjunction with HL7 messagingIn conjunction with HL7 messaging
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Semantic interoperability projects Semantic interoperability projects BRIDGBRIDG
Biomedical Research Integrated Domain GroupBiomedical Research Integrated Domain GroupInformation model for clinical researchInformation model for clinical researchInteroperability between clinical trials information Interoperability between clinical trials information systemssystemsO t l i id l t t th i f ti d lO t l i id l t t th i f ti d l
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Ontologies provide value sets to the information modelOntologies provide value sets to the information model
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Semantic interoperability projects Semantic interoperability projects CDACDA
Clinical Document Architecture (CDA R2)Clinical Document Architecture (CDA R2)Formal representation of clinical statementsFormal representation of clinical statements
Clinical observationsClinical observationsMedication administrationMedication administrationAdverse eventsAdverse events
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Adverse eventsAdverse events
Associate an information model (HL7 RIM) with Associate an information model (HL7 RIM) with terminologies (LOINC, SNOMED CT, RxNorm)terminologies (LOINC, SNOMED CT, RxNorm)
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Semantic interoperability projects Semantic interoperability projects caCOREcaCORE
Cancer Common Cancer Common OntologicOntologic Representation Representation EnvironmentEnvironment
Infrastructure developed to support an interoperable Infrastructure developed to support an interoperable biomedical information system for cancer researchbiomedical information system for cancer researchU th NCI Th tU th NCI Th t
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Uses the NCI Thesaurus as a componentUses the NCI Thesaurus as a component
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Data integration, exchange and Data integration, exchange and g , gg , gsemantic interoperabilitysemantic interoperability
Information and data integrationInformation and data integration
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Approaches to data integrationApproaches to data integration
WarehousingWarehousingSources to be Sources to be integrated are integrated are transformed into a transformed into a common format andcommon format and
MediationMediationLocal schema (of the Local schema (of the sources)sources)Global schema (in Global schema (in reference to which the reference to which the
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common format and common format and converted to a common converted to a common vocabularyvocabulary
Normalization through Normalization through ontologies (e.g., GO ontologies (e.g., GO annotations)annotations)
queries are made)queries are made)
Ontologies help define Ontologies help define the global schema and the global schema and map between local and map between local and global schemas global schemas ((OntoFusionOntoFusion, ARIANE), ARIANE)
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Ontologies and integrationOntologies and integration
Terminology integration systems help bridge Terminology integration systems help bridge across across terminolgiesterminolgies and the domains they and the domains they representrepresentMappings across ontologies enable the integration Mappings across ontologies enable the integration
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of namespaces in the Semantic Webof namespaces in the Semantic Web
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TransTrans--namespace integrationnamespace integration
Geneticknowledge bases
OMIMOther
subdomains
…
Addison's disease (363732003)
Clinicalrepositories
SNOMED CT
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Genomeannotations
GOModelorganisms
NCBITaxonomy
…
Anatomy
FMA
UMLSAddison Disease (D000224)
Biomedicalliterature
MeSHUMLSC0001403
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Decision support and reasoningDecision support and reasoningpp gpp g
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Data selectionData selection
The structure of biomedical ontologies helps The structure of biomedical ontologies helps define groups of values from a highdefine groups of values from a high--level valuelevel value
Vs. enumerating all possible valuesVs. enumerating all possible values
Useful for data selection in clinical studiesUseful for data selection in clinical studies
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ICD is used pervasively for this purposeICD is used pervasively for this purposeE.g., Study on E.g., Study on supraventricularsupraventricular tachycardia (SVT), tachycardia (SVT), based on 2 highbased on 2 high--level ICD codeslevel ICD codes
Similarity with the definition of value sets for use Similarity with the definition of value sets for use in the information modelin the information model
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Data aggregationData aggregation
Ontologies help partition/aggregate data in data Ontologies help partition/aggregate data in data analysisanalysis
Clinical studies: Study a variable in groups of patients Clinical studies: Study a variable in groups of patients corresponding to the top level categories in ICDcorresponding to the top level categories in ICDBi l t di F ti l h t i ti fBi l t di F ti l h t i ti f
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Biology studies: Functional characterization of gene Biology studies: Functional characterization of gene expression signatures with highexpression signatures with high--level concepts from the level concepts from the Gene OntologyGene Ontology
Recent trend: coRecent trend: co--clusteringclustering
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Decision supportDecision support
Clinical decision supportClinical decision supportOntologies help normalize the vocabulary and increase Ontologies help normalize the vocabulary and increase the recall of rulesthe recall of rulesOntologies provide some domain knowledge and make Ontologies provide some domain knowledge and make it possible to create highit possible to create high level rules (e g for a class oflevel rules (e g for a class of
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it possible to create highit possible to create high--level rules (e.g., for a class of level rules (e.g., for a class of drugs rather than for each drug in the class)drugs rather than for each drug in the class)
Other forms of decision supportOther forms of decision supportBased on automatic reasoning services for OWL Based on automatic reasoning services for OWL ontologies (e.g., grading ontologies (e.g., grading gliomasgliomas with with NCItNCIt))
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Natural language processing applicationsNatural language processing applications
Ontologies provide background domain Ontologies provide background domain knowledge for NLP applicationsknowledge for NLP applications
Question answeringQuestion answeringDocument summarizationDocument summarization
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LiteratureLiterature--based discoverybased discoveryThe UMLS is often used, but other specific The UMLS is often used, but other specific resources have been developedresources have been developed
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Knowledge discoveryKnowledge discovery
By standardizing the vocabulary in a given By standardizing the vocabulary in a given domain, ontologies are enabling resources for domain, ontologies are enabling resources for knowledge discovery through data miningknowledge discovery through data miningLess frequently, the structure of the ontology is Less frequently, the structure of the ontology is
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leveraged by data mining algorithmsleveraged by data mining algorithmsExample of available datasetsExample of available datasets
ICDICD--coded clinical data (in conjunction with noncoded clinical data (in conjunction with non--clinical information, e.g., environmental data)clinical information, e.g., environmental data)Annotation of gene products to the GO (function Annotation of gene products to the GO (function prediction)prediction)
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Barriers to usability of biomedical Barriers to usability of biomedical yyontologiesontologies
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AvailabilityAvailability
Many ontologies are freely availableMany ontologies are freely availableThe UMLS is freely available for research The UMLS is freely available for research purposespurposes
CostCost--free license requiredfree license requiredLi i i b t i kLi i i b t i k
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Licensing issues can be trickyLicensing issues can be trickySNOMED CT is freely available in member countries SNOMED CT is freely available in member countries of the IHTSDOof the IHTSDO
Being freely availableBeing freely availableIs a requirement for the Open Biomedical Ontologies Is a requirement for the Open Biomedical Ontologies (OBO)(OBO)Is a de facto prerequisite for Semantic Web applicationsIs a de facto prerequisite for Semantic Web applications
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DiscoverabilityDiscoverability
Ontology repositoriesOntology repositoriesUMLS: 143 source vocabulariesUMLS: 143 source vocabularies(biased towards healthcare applications)(biased towards healthcare applications)NCBO NCBO BioPortalBioPortal: ~100 : ~100 ontologiesontologies(biased towards biological applications)(biased towards biological applications)
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(biased towards biological applications)(biased towards biological applications)Limited overlap between the two repositoriesLimited overlap between the two repositories
Need for discovery servicesNeed for discovery services
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FormalismFormalism
Several major formalismSeveral major formalismWeb Ontology Language (OWL) Web Ontology Language (OWL) –– NCI ThesaurusNCI ThesaurusOBO format OBO format –– most OBO ontologiesmost OBO ontologiesUMLS Rich Release Format (RRF) UMLS Rich Release Format (RRF) –– UMLS, RxNormUMLS, RxNorm
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Conversion mechanismsConversion mechanismsOBO to OWLOBO to OWLLexGridLexGrid (import/export to (import/export to LexGridLexGrid internal format)internal format)
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Ontology integrationOntology integration
Post hoc Post hoc integration , form the bottom upintegration , form the bottom upUMLS approachUMLS approachIntegrates ontologies “as is”, including legacy Integrates ontologies “as is”, including legacy ontologiesontologiesF ilit t th i t ti f th di d t tF ilit t th i t ti f th di d t t
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Facilitates the integration of the corresponding datasetsFacilitates the integration of the corresponding datasets
Coordinated development of Coordinated development of ontolgoiesontolgoiesOBO Foundry approachOBO Foundry approachEnsures consistency Ensures consistency abab initioinitioExcludes legacy ontologiesExcludes legacy ontologies
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QualityQuality
Quality assurance in ontologies is still imperfectly Quality assurance in ontologies is still imperfectly defineddefined
Difficult to define outside a use case or applicationDifficult to define outside a use case or applicationSeveral approaches to evaluating qualitySeveral approaches to evaluating quality
Collaboratively by users (Web 2 0 approach)Collaboratively by users (Web 2 0 approach)
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Collaboratively, by users (Web 2.0 approach)Collaboratively, by users (Web 2.0 approach)Marginal notes enabled by Marginal notes enabled by BioPortalBioPortal
Centrally, by expertsCentrally, by expertsOBO Foundry approachOBO Foundry approach
Important factors besides qualityImportant factors besides qualityGovernanceGovernanceInstalled base / Community of practiceInstalled base / Community of practice
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 209
June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Interfaces to Biomedical OntologiesInterfaces to Biomedical Ontologies
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 10, 2008 June 10, 2008 –– Session #1Session #1
Interfaces to Biomedical OntologiesInterfaces to Biomedical Ontologies
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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OverviewOverview
Graphical interfacesGraphical interfacesUMLS Knowledge Source ServerUMLS Knowledge Source ServerNCBO NCBO BioPortalBioPortalNCI ThesaurusNCI ThesaurusMeSH browserMeSH browser
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MeSH browserMeSH browserFoundational Model of Anatomy (FMA) ExplorerFoundational Model of Anatomy (FMA) ExplorerGene Ontology Gene Ontology AmiGOAmiGOICDICD--10 online10 onlineRxNav (RxNorm)RxNav (RxNorm)[…][…]
Application Programming InterfacesApplication Programming Interfaces
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Graphical interfacesGraphical interfacespp
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UMLS Knowledge Source ServerUMLS Knowledge Source Server
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 213
http://umlsks.nlm.nih.gov/
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UMLS Semantic NavigatorUMLS Semantic Navigator
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 214http://mor.nlm.nih.gov/perl/semnav.pl
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NCBO NCBO BioPortalBioPortal
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 215http://www.bioontology.org/tools/portal/bioportal.html
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NCI Thesaurus (EVS Server)NCI Thesaurus (EVS Server)
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 216http://nciterms.nci.nih.gov/NCIBrowser/SearchConcept.do
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MeSH BrowserMeSH Browser
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 217http://www.nlm.nih.gov/mesh/MBrowser.html
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Foundational Model of AnatomyFoundational Model of Anatomy
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 218http://sig.biostr.washington.edu/projects/fm/FME/
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Gene Ontology Gene Ontology AmiGOAmiGO
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 219http://www.geneontology.org/http://www.geneontology.org/
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SNOMED CT SNOMED CT University of SydneyUniversity of Sydney
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http://www.it.usyd.edu.au/~hitru/sct/A1.cgihttp://www.it.usyd.edu.au/~hitru/sct/A1.cgi
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SNOMED CT SNOMED CT CliniClueCliniClue
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 221
www.cliniclue.com/
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SNOMED CT SNOMED CT SNOBSNOB
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 222
http://snob.eggbird.eu/http://snob.eggbird.eu/
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ICDICD--1010
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http://www.who.int/classifications/apps/icd/icd10online/http://www.who.int/classifications/apps/icd/icd10online/
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RxNav (RxNorm)RxNav (RxNorm)http://mor.nlm.nih.gov/download/rxnav/http://mor.nlm.nih.gov/download/rxnav/
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Application Programming InterfacesApplication Programming Interfacespp g gpp g g
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Application Programming InterfaceApplication Programming Interface
Expose resources in such a way that they can be Expose resources in such a way that they can be integrated in programsintegrated in programs
Programming “against” a resourceProgramming “against” a resource
Standard protocols for communicationStandard protocols for communication
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Web services (SOAP, REST)Web services (SOAP, REST)Standard libraries for programmingStandard libraries for programmingFocus on content, not messageFocus on content, not message
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UMLSKS Web Service APIUMLSKS Web Service API
UMLSKS UMLSKS http://umlsks.nlm.nih.gov/http://umlsks.nlm.nih.gov/Developer's Guide > Developer's Guide > WebserviceWebservice OperationsOperations
WSDL availableWSDL availableAPI give access to all 3 knowledge sourcesAPI give access to all 3 knowledge sources
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g gg gLicensing issuesLicensing issues
Granting ticket and SingleGranting ticket and Single--use ticketsuse tickets
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UMLSKS Web Service API UMLSKS Web Service API ExampleExample
ConceptIdGroupConceptIdGroup findCUIByNormStringfindCUIByNormString((ConceptIdNormStringRequestConceptIdNormStringRequest request);request);
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Other APIs to terminology systemsOther APIs to terminology systems
NCBO NCBO BioPortalBioPortalhttp://www.bioontology.org/docs/bioportal/development/http://www.bioontology.org/docs/bioportal/development/web_services.htmlweb_services.htmlOLS OLS -- Ontology Lookup ServiceOntology Lookup Servicehttp://www.ebi.ac.uk/ontologyhttp://www.ebi.ac.uk/ontology--lookup/WSDLDocumentation.dolookup/WSDLDocumentation.do
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 229
http://www.ebi.ac.uk/ontologyhttp://www.ebi.ac.uk/ontology--lookup/WSDLDocumentation.dolookup/WSDLDocumentation.do
RxNormRxNormhttp://mor.nlm.nih.gov/download/rxnav/RxNormAPI.htmlhttp://mor.nlm.nih.gov/download/rxnav/RxNormAPI.html
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Applications based on WS APIsApplications based on WS APIs
UMLSKS APIUMLSKS APIUMLSKSUMLSKShttp://umlsks.nlm.nih.gov/http://umlsks.nlm.nih.gov/
RxNorm APIRxNorm API
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RxNavRxNavhttp://mor.nlm.nih.gov/download/rxnav/rxnav.jnlphttp://mor.nlm.nih.gov/download/rxnav/rxnav.jnlpMyMedicationListMyMedicationListhttp://mml.nlm.nih.gov/MyMedicationList.jnlphttp://mml.nlm.nih.gov/MyMedicationList.jnlp
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 231
June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Searching and AnalyzingSearching and Analyzing
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 10, 2008 June 10, 2008 –– Session #2Session #2
Biomedical ConceptsBiomedical Concepts
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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Exercise 1Exercise 1
What are the Clinical Drug Components for What are the Clinical Drug Components for ZyrtecZyrtec? (RxNav)? (RxNav)
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Exercise 2Exercise 2
What are the parts of the What are the parts of the AortaAorta? (FMA)? (FMA)
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Exercise 3Exercise 3
What are the parents of What are the parents of Hodgkin’s diseaseHodgkin’s disease in in SNOMED CT?SNOMED CT?
Try SNOMEDCTID: 118599009 Try SNOMEDCTID: 118599009
What is its associated morphology?What is its associated morphology?
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Exercise 4Exercise 4
What are the various meanings of What are the various meanings of ILIL--22? (UMLS)? (UMLS)
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Exercise 5Exercise 5
What are the pharmacologic actions of What are the pharmacologic actions of ZyrtecZyrtec? ? (MeSH)(MeSH)
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Exercise 6Exercise 6
What are some synonyms for What are some synonyms for SchwannomaSchwannoma? (NCI ? (NCI Thesaurus)Thesaurus)
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SolutionsSolutions
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Exercise 1Exercise 1
What are the Clinical Drug Components for What are the Clinical Drug Components for ZyrtecZyrtec? (RxNav)? (RxNav)
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Exercise 2Exercise 2
What are the parts of the Aorta? (FMA)What are the parts of the Aorta? (FMA)
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Exercise 3Exercise 3
What are the parents of What are the parents of Hodgkin’s diseaseHodgkin’s disease in in SNOMED DT?SNOMED DT?
Try SNOMEDCTID: 118599009 Try SNOMEDCTID: 118599009
What is its associated morphology?What is its associated morphology?
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Exercise 4Exercise 4
What are the various meanings of What are the various meanings of ILIL--22? (UMLS)? (UMLS)
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Exercise 5Exercise 5
What are the pharmacologic actions of What are the pharmacologic actions of ZyrtecZyrtec? ? (MeSH)(MeSH)
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Exercise 6Exercise 6
What are some synonyms for What are some synonyms for SchwannomaSchwannoma? (NCI ? (NCI Thesaurus)Thesaurus)
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What to look forWhat to look for
Search modalitiesSearch modalitiesSpelling correction / autoSpelling correction / auto--completion / normalizationcompletion / normalizationWord combinations (AND/OR)Word combinations (AND/OR)
VisualizationVisualization
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Graph vs. (forest of) treesGraph vs. (forest of) trees
NavigationNavigationWhat properties What properties are displayedare displayed
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
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June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Contrasting and CritiquingContrasting and Critiquing
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 10, 2008 June 10, 2008 –– Session #3 / June 11, 2008 Session #3 / June 11, 2008 –– Session #1Session #1
Biomedical OntologiesBiomedical Ontologies
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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Exercise #1Exercise #1
Hodgkin’s diseaseHodgkin’s diseaseNCI ThesaurusNCI ThesaurusSNOMED CTSNOMED CT
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Exercise #2Exercise #2
ProstateProstateFMAFMASNOMED CTSNOMED CT
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Exercise #3Exercise #3
CetirizineCetirizineMeSHMeSHSNOMED CTSNOMED CT
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SolutionsSolutions
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SolutionsSolutions
Exercise #1Exercise #1
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Exercise #1Exercise #1
Hodgkin’s diseaseHodgkin’s diseaseNCI ThesaurusNCI Thesaurus
Using the NCI browser (EVS)Using the NCI browser (EVS)http://nciterms.nci.nih.gov/http://nciterms.nci.nih.gov/
SNOMED CTSNOMED CT
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SNOMED CTSNOMED CTUsing the online browser from U. SydneyUsing the online browser from U. Sydneyhttp://www.cs.usyd.edu.au/~hitru/sct/A3.cgihttp://www.cs.usyd.edu.au/~hitru/sct/A3.cgi
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Hodgkin’s disease in Hodgkin’s disease in NCItNCIt (1)(1)
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Hodgkin’s disease in Hodgkin’s disease in NCItNCIt (1)(1)
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Comments on Hodgkin’s disease in Comments on Hodgkin’s disease in NCItNCIt (1)(1)
Search term: “Hodgkin’s disease”Search term: “Hodgkin’s disease”Not found, although “Hodgkin’s disease” is listed as a Not found, although “Hodgkin’s disease” is listed as a synonymsynonymSearch on “Search on “hodgkinhodgkin”, select “Hodgkin lymphoma””, select “Hodgkin lymphoma”
ll
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Parent classesParent classesCommon hematopoietic neoplasmCommon hematopoietic neoplasm
Not an ontological categoryNot an ontological categoryWould be better represented through an associative relation Would be better represented through an associative relation (e.g., along the lines of “(e.g., along the lines of “has_prevalencehas_prevalence high prevalence”)high prevalence”)IsaIsa overloadingoverloading
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Comments on Hodgkin’s disease in Comments on Hodgkin’s disease in NCItNCIt (2)(2)
Associative relationsAssociative relationsFor cancers, anatomy and morphology are foundational For cancers, anatomy and morphology are foundational relationsrelationsHereHere
Anatom :Anatom : Di H P i A t i SitDi H P i A t i Sit
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Anatomy : Anatomy : Disease_Has_Primary_Anatomic_SiteDisease_Has_Primary_Anatomic_SiteHematopoietic and Lymphatic SystemHematopoietic and Lymphatic SystemMorphology: not directly representedMorphology: not directly represented(indirectly through (indirectly through Disease_Has_Normal_Cell_OriginDisease_Has_Normal_Cell_Origin Mature Mature Lymphocyte)Lymphocyte)
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Hodgkin’s disease in SNOMED CT (1)Hodgkin’s disease in SNOMED CT (1)
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Hodgkin’s disease in SNOMED CT (2)Hodgkin’s disease in SNOMED CT (2)
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Comments on Hodgkin’s disease in SNOMED CT (1)Comments on Hodgkin’s disease in SNOMED CT (1)
Search term: “Hodgkin’s disease”Search term: “Hodgkin’s disease”Not found, although “Hodgkin’s disease” is listed as a synonymNot found, although “Hodgkin’s disease” is listed as a synonym
Search result: “Hodgkin lymphoma, nodular sclerosis, grade 1 Search result: “Hodgkin lymphoma, nodular sclerosis, grade 1 (morphologic abnormality)”(morphologic abnormality)”
Search on “lymphoma”, navigate down from “Malignant Search on “lymphoma”, navigate down from “Malignant lymphoma”lymphoma”
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““hodgkin’shodgkin’s disease” is ambiguousdisease” is ambiguousHodgkin lymphoma, no ICDHodgkin lymphoma, no ICD--O subtype (morphologic abnormality)O subtype (morphologic abnormality)Hodgkin's disease (disorder)Hodgkin's disease (disorder)
“Malignant lymphoma, Hodgkin's”“Malignant lymphoma, Hodgkin's”NB: lymphoma is always malignantNB: lymphoma is always malignant
Parent classesParent classesMalignant lymphoma (clinical) [OK]Malignant lymphoma (clinical) [OK]
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Comments on Hodgkin’s disease in SNOMED CT (2)Comments on Hodgkin’s disease in SNOMED CT (2)
Associative relationsAssociative relationsFor cancers, anatomy and morphology are foundational For cancers, anatomy and morphology are foundational relationsrelationsHereHere
Anatom : not directl representedAnatom : not directl represented
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Anatomy : not directly representedAnatomy : not directly represented(indirectly through descendant concepts, e.g., Hodgkin's (indirectly through descendant concepts, e.g., Hodgkin's disease of disease of intrathoracicintrathoracic lymph nodes)lymph nodes)Morphology: Morphology: Associated morphologyAssociated morphology Hodgkin lymphoma Hodgkin lymphoma --categorycategory
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Hodgkin’s disease Hodgkin’s disease NCItNCIt vs. SNOMED CT (1)vs. SNOMED CT (1)
Shared synonyms: Shared synonyms: NCItNCIt 1/2, SNOMED CT 1/31/2, SNOMED CT 1/3Hodgkin’s diseaseHodgkin’s disease
Shared relationsShared relationsIsaIsa
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NCItNCIt: Lymphoma: Lymphoma–– Definition: “malignant (Definition: “malignant (clonalclonal) proliferation of B) proliferation of B--
lymphocytes or Tlymphocytes or T-- lymphocytes which involves the lymph lymphocytes which involves the lymph nodes, bone marrow and/or nodes, bone marrow and/or extranodalextranodal sites. This category sites. This category includes Nonincludes Non--Hodgkin lymphomas and Hodgkin Hodgkin lymphomas and Hodgkin lymphomas.”lymphomas.”
SNOMED CT: Malignant lymphomaSNOMED CT: Malignant lymphomaSame UMLS concept (CUI: C0024299)Same UMLS concept (CUI: C0024299)
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Hodgkin’s disease Hodgkin’s disease NCItNCIt vs. SNOMED CT (2)vs. SNOMED CT (2)
Shared relations: Associative relationsShared relations: Associative relationsAnatomyAnatomy
In In NCItNCIt, but not in SNOMED CT, but not in SNOMED CT
MorphologyMorphologyIn SNOMED CT b t not inIn SNOMED CT b t not in NCItNCIt
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In SNOMED CT, but not in In SNOMED CT, but not in NCItNCIt–– Only indirectly, though cell typeOnly indirectly, though cell type
Cell typeCell typeOnly in Only in NCItNCIt
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SolutionsSolutions
Exercise #2Exercise #2
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Exercise #2Exercise #2
ProstateProstateFMAFMA
Using the Foundational Model ExplorerUsing the Foundational Model Explorerhttp://sig.biostr.washington.edu/projects/fm/FME/http://sig.biostr.washington.edu/projects/fm/FME/
SNOMED CTSNOMED CT
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SNOMED CTSNOMED CTUsing the online browser from U. SydneyUsing the online browser from U. Sydneyhttp://www.cs.usyd.edu.au/~hitru/sct/A3.cgihttp://www.cs.usyd.edu.au/~hitru/sct/A3.cgi
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Prostate in FMA (1)Prostate in FMA (1)
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Prostate in FMA (2)Prostate in FMA (2)
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Comments on Prostate in FMAComments on Prostate in FMA
No synonyms in EnglishNo synonyms in EnglishLatin and Spanish synonymsLatin and Spanish synonyms
HierarchiesHierarchiesIsaIsa: Lobular organ: Lobular organ
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Part_ofPart_of: Set of pelvic viscera: Set of pelvic viscera
Associative relationsAssociative relationsLymphatic drainageLymphatic drainageNo spatial relationsNo spatial relations
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Prostate in SNOMED CT (1)Prostate in SNOMED CT (1)
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Prostate in SNOMED CT (2)Prostate in SNOMED CT (2)
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Comments on Prostate in SNOMED CTComments on Prostate in SNOMED CT
“Ambiguous” term“Ambiguous” termEntire prostateEntire prostateProstatic structureProstatic structure
StructureStructure--EntireEntire--Part representation of anatomical Part representation of anatomical
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entities in SNOMED CTentities in SNOMED CTReification of Reification of part_ofpart_ofEnables Enables mereologicalmereological inference through inference through isaisa hierarchyhierarchyNot intuitiveNot intuitive
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StructureStructure--EntireEntire--Part (SEP) triplesPart (SEP) triples
S S –– The The entity or any of its partsE E –– The entire anatomical entityThe entire anatomical entityP P –– Any parts of the anatomical entityanatomical entity
Entire X
X part
X structure
[Schulz & al., 1997]
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Entire kidney
Kidney part
Kidney structure
isa
part_of
[Schulz & al., 1997][Schulz & al., 1998]
[Bodenreider et al, 2006]
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Mereological inference through Mereological inference through isaisa
Entire kidney
Kidney structure
isa
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Kidney part part_of
Entire cortexof kidney
Entire poleof kidney
Structure oflayer of kidney
Structure ofregion of kidney
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FMA mapping goes to FMA mapping goes to EntireEntire
FMAFMA SNOMED CTSNOMED CT
Kidney structure
isaSyn: Kidney
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Entire kidney
Kidney part part_of
KidneySyn: Kidney
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Prostate Prostate FMA vs. SNOMED CTFMA vs. SNOMED CT
Shared synonyms: FMA 1/1, SNOMED CT 1/2Shared synonyms: FMA 1/1, SNOMED CT 1/2ProstateProstate
Shared relationsShared relationsIsaIsa: no: no
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FMAFMA–– Lobular organLobular organ
SNOMED CTSNOMED CT–– Prostatic structureProstatic structure–– Male internal genital organMale internal genital organ–– Entire male genital organEntire male genital organ
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Prostate Prostate FMA vs. SNOMED CTFMA vs. SNOMED CT
Shared relationsShared relationsPart ofPart of: almost: almost
FMAFMA–– Genital systemGenital system–– Content ofContent of malemale pelvispelvis
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Content of Content of malemale pelvispelvis–– Set of male pelvic visceraSet of male pelvic viscera–– Set of pelvic visceraSet of pelvic viscera
SNOMED CTSNOMED CT–– Entire minor pelvisEntire minor pelvis–– Entire Entire malemale genital systemgenital system–– ……
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SolutionsSolutions
Exercise #3Exercise #3
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Exercise #3Exercise #3
CetirizineCetirizineMeSHMeSH
Using the MeSH browserUsing the MeSH browserhttp://www.nlm.nih.gov/mesh/MBrowser.htmlhttp://www.nlm.nih.gov/mesh/MBrowser.html
SNOMED CTSNOMED CT
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SNOMED CTSNOMED CTUsing the online browser from U. SydneyUsing the online browser from U. Sydneyhttp://www.cs.usyd.edu.au/~hitru/sct/A3.cgihttp://www.cs.usyd.edu.au/~hitru/sct/A3.cgi
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CetirizineCetirizine in MeSH (1)in MeSH (1)
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…
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CetirizineCetirizine in MeSH (2)in MeSH (2)
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Comments on Comments on CetirizineCetirizine in MeSHin MeSH
45 entry terms45 entry termsVarious generic and brand namesVarious generic and brand namesChemical formulaChemical formulaCode (PCode (P--071)071)
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HierarchyHierarchyIsaIsa: : PiperazinesPiperazines [chemistry][chemistry]
Pharmacologic actionPharmacologic actionAntiAnti--Allergic Agents Allergic Agents Histamine H1 Antagonists, NonHistamine H1 Antagonists, Non--SedatingSedating
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CetirizineCetirizine in SNOMED CT (1)in SNOMED CT (1)
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CetirizineCetirizine in SNOMED CT (2)in SNOMED CT (2)
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Comments on Comments on CetirizineCetirizine in SNOMED CTin SNOMED CT
Ambiguous termAmbiguous termCetirizineCetirizine (product) (product) CetirizineCetirizine (substance)(substance)
HierarchyHierarchyII NN d tid ti
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IsaIsa: Non: Non--sedating sedating antihistamine antihistamine (substance)(substance)[pharmacologic[pharmacologicaction]action]
No associativeNo associativerelationsrelations
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CetirizineCetirizine MeSH vs. SNOMED CT (1)MeSH vs. SNOMED CT (1)
Shared synonyms: MeSH 1/45, SNOMED CT 1/1Shared synonyms: MeSH 1/45, SNOMED CT 1/1CetirizineCetirizine
Shared relations: noneShared relations: noneMeSH:MeSH:
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IsaIsa: <chemistry>: <chemistry>Associative: <pharmacologic action>Associative: <pharmacologic action>
SNOMED CTSNOMED CTIsaIsa: < pharmacologic action>: < pharmacologic action>Associative: noneAssociative: none
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CetirizineCetirizine MeSH vs. SNOMED CT (2)MeSH vs. SNOMED CT (2)
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SummarySummary
Differing representationsDiffering representationsNot necessarily inconsistentNot necessarily inconsistentConsistency may be difficult to assess automaticallyConsistency may be difficult to assess automatically
Often due to idiosyncratic representation in one Often due to idiosyncratic representation in one
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ontologyontology
Hindrance to ontology alignment and evaluation Hindrance to ontology alignment and evaluation methods relying on shared relationsmethods relying on shared relations
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
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June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Extending Biomedical OntologiesExtending Biomedical Ontologies
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 9, 2008 June 9, 2008 –– Session #2Session #2
Extending Biomedical OntologiesExtending Biomedical Ontologies
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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OverviewOverview
Corpus terminologyCorpus terminologyIdentify terms in biomedical text (in reference to Identify terms in biomedical text (in reference to the UMLS)the UMLS)Identify additional termsIdentify additional terms
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yyPlace these terms in UMLS hierarchiesPlace these terms in UMLS hierarchies
[Bodenreider, ACL 2002]
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Tiny corpus Tiny corpus One MEDLINE abstractOne MEDLINE abstract
PMID: 18499615
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Identify UMLS concepts with Identify UMLS concepts with MetaMapMetaMap
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http://skr.nlm.nih.gov/
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Interactive modeInteractive mode
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Interactive Interactive MetaMapMetaMap
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Paste abstractPaste abstract
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Select optionsSelect options
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Run Run MetaMapMetaMap
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OutputOutput
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Suggest term candidatesSuggest term candidates
Not recognized by Not recognized by MetaMapMetaMap ay allay allPartially identified by Partially identified by MetaMapMetaMapMissing terms in a conceptMissing terms in a concept
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Suggest placement in UMLSSuggest placement in UMLS
Use a browserUse a browserIdentify close parentIdentify close parentExamine its childrenExamine its childrenAssess placement by comparing with potentialAssess placement by comparing with potential
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Assess placement by comparing with potential Assess placement by comparing with potential siblingssiblings
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Possible new terms (1)Possible new terms (1)
HypothalamopituitaryHypothalamopituitary axisaxisConcept exists: C0678897, but missing exact Concept exists: C0678897, but missing exact (neoclassical) synonym(neoclassical) synonym
hypothalamic pituitary axishypothalamic pituitary axishypothalamus hypothalamus hypophysishypophysis axisaxis
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hypothalamushypothalamus--pituitary axispituitary axis
American College of Chest PhysiciansAmerican College of Chest PhysiciansSimilar to other American CollegesSimilar to other American Colleges(e.g., (e.g., American College of PhysiciansAmerican College of Physicians ())())Integrate as a child of Integrate as a child of Professional Organization or Professional Organization or GroupGroup (C1522486 )(C1522486 )NB: instance, cannot be a child of ACPNB: instance, cannot be a child of ACP
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Possible new terms (2)Possible new terms (2)
Free Free cortisolcortisolIdentified as a substance (C0443476 ), not a laboratory Identified as a substance (C0443476 ), not a laboratory procedure / test resultprocedure / test result
CortisolCortisol, free measurement, free measurement (C0236401)(C0236401)
C lC l th dth d
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CoolensCoolens methodmethodMissing term / conceptMissing term / conceptMethod for estimating (not measuring directly) the free Method for estimating (not measuring directly) the free fraction of fraction of cortisolcortisol
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Possible new terms (3)Possible new terms (3)
ElectrochemiluminescenceElectrochemiluminescence immunoassayimmunoassayMissing conceptMissing conceptCreate as a child of Create as a child of ChemiluminescenceChemiluminescence assayassay(C0201709 )(C0201709 )
ii
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NonsurvivorsNonsurvivorsSurvivorsSurvivors exists as a concept (C0206194)exists as a concept (C0206194)Create as a child of Create as a child of Patients Patients (C0030705)(C0030705)
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AgendaAgenda
Monday,June 9
Introduction to Biomedical Ontologies
Design Principles, Formalisms and Tools for Biomedical Ontologies
Biomedical Ontologies- Content and structure- Function
Tuesday,J 10
Interfaces to Bi di l
Searching and A l i
Contrasting Bi di l
Lister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical CommunicationsLister Hill National Center for Biomedical Communications 305
June 10 Biomedical Ontologies
AnalyzingBiomedical Concepts
Biomedical Ontologies
Wednesday,June 11
Critical Analysis of Biomedical Ontologies
Extending Biomedical Ontologies
Using Biomedical Ontologiesfor Data Integration
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Using Biomedical OntologiesUsing Biomedical Ontologies
Short course Short course –– Summer 2008Summer 2008Biomedical Ontology in PracticeBiomedical Ontology in Practice
June 11, 2008 June 11, 2008 –– Session #3Session #3
for Data Integrationfor Data Integration
Olivier BodenreiderOlivier Bodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
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OverviewOverview
MotivationMotivationSome practical considerations and issuesSome practical considerations and issues
Integration approachesIntegration approachesConcept repositoriesConcept repositories
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Using existing mappingsUsing existing mappingsCreating mappings through the UMLSCreating mappings through the UMLSComparing semantic descriptionsComparing semantic descriptions
Thinking outside the integration boxThinking outside the integration box
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MotivationMotivation
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Motivation Motivation Translational researchTranslational research
“Bench to Bedside”“Bench to Bedside”Integration of clinical and research activities and Integration of clinical and research activities and resultsresultsSupported by research programsSupported by research programs
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pp y p gpp y p gNIH RoadmapNIH RoadmapClinical and Translational Science Awards (CTSA)Clinical and Translational Science Awards (CTSA)
Requires the effective integration and exchange Requires the effective integration and exchange and of information betweenand of information between
Basic researchBasic researchClinical researchClinical research
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Translational research Translational research NIH RoadmapNIH Roadmap
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Motivation Motivation Translational researchTranslational research
BasicResearch
ClinicalResearch
and
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Research andPractice
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Terminology and translational researchTerminology and translational research
CancerBasic
EHRCancer
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Research Patients
NCI Thesaurus SNOMED CT
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Some practical considerationsSome practical considerationsppand issuesand issues
Integration approachesIntegration approaches
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Approaches to data integrationApproaches to data integration
WarehousingWarehousingSources to be Sources to be integrated are integrated are transformed into a transformed into a common format andcommon format and
MediationMediationLocal schema (of the Local schema (of the sources)sources)Global schema (in Global schema (in reference to which the reference to which the
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common format and common format and converted to a common converted to a common vocabularyvocabulary
Normalization through Normalization through ontologies (e.g., GO ontologies (e.g., GO annotations)annotations)
queries are made)queries are made)
Ontologies help define Ontologies help define the global schema and the global schema and map between local and map between local and global schemas global schemas ((OntoFusionOntoFusion, ARIANE), ARIANE)
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Some practical considerationsSome practical considerationsppand issuesand issues
Concept repositoriesConcept repositories
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(Integrated) concept repositories(Integrated) concept repositories
Unified Medical Language SystemUnified Medical Language Systemhttp://umlsks.nlm.nih.govhttp://umlsks.nlm.nih.govNCBO’s NCBO’s BioPortalBioPortalhttp://www.bioontology.org/tools/portal/bioportal.htmlhttp://www.bioontology.org/tools/portal/bioportal.html
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Open Biomedical Ontologies (OBO)Open Biomedical Ontologies (OBO)http://obofoundry.org/http://obofoundry.org/caDSRcaDSRhttp://ncicb.nci.nih.gov/NCICB/infrastructure/cacore_ovehttp://ncicb.nci.nih.gov/NCICB/infrastructure/cacore_overview/cadsrrview/cadsr
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Integrating subdomainsIntegrating subdomains
Geneticknowledge bases
OMIM
Clinicalrepositories
SNOMED CTOthersubdomains
…
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Biomedicalliterature
MeSH
Genomeannotations
GOModelorganisms
NCBITaxonomy
…
Anatomy
FMA
UMLS
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TransTrans--namespace integrationnamespace integration
Geneticknowledge bases
OMIMOther
subdomains
…
Addison's disease (363732003)
Clinicalrepositories
SNOMED CT
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Genomeannotations
GOModelorganisms
NCBITaxonomy
…
Anatomy
FMA
UMLSAddison Disease (D000224)
Biomedicalliterature
MeSHUMLSC0001403
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Some practical considerationsSome practical considerationsppand issuesand issues
MappingsMappings
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MappingsMappings
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UMLS
NCI Thesaurus SNOMED CT
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MappingsMappings
Created manuallyCreated manuallyUMLSUMLS
Created automaticallyCreated automaticallyBioPortalBioPortal
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Key to enabling semantic interoperabilityKey to enabling semantic interoperabilityEnabling resource for the Semantic WebEnabling resource for the Semantic Web
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Quality of mappingsQuality of mappings
Created for a purposeCreated for a purposeReusability issuesReusability issues
Generally unidirectionalGenerally unidirectionalMapping from ontology 1 to ontology 2Mapping from ontology 1 to ontology 2
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Not necessarily reversibleNot necessarily reversible
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Some practical considerationsSome practical considerationsppand issuesand issues
Comparing semantic descriptionsComparing semantic descriptions
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Semantic descriptions Semantic descriptions ConsistentConsistent
S:Disorder of pancreas
S:finding siteS:finding site
S:Pancreatic structure
N:Pancreatic disorder
N:disease assoc.N:disease assoc.anat. siteanat. site
N:Pancreasowl:sameAsowl:sameAs
owl:sameAsowl:sameAs
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S:Disorder of pancreas
S:Disorder of endocrine pancreas
S:is_aS:is_a
U:hasCUIU:hasCUI
C0030286
N:Pancreatic disorder
N:Endocrine pancreas disorder
N:subClassOfN:subClassOf
U:hasCUIU:hasCUI
C0030286
owl:sameAsowl:sameAs
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SNOMED CT/NCI Thesaurus SNOMED CT/NCI Thesaurus Limited consistencyLimited consistency
Subclass (N=3699)
Whole (N=1004)
Superclass (N=20360)
Any (N=20363)
Dir
ect
0
1
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0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Associative (N=6548)
Whole (N=1004)
Superclass (N=20360)
Part (N=76)
Subclass (N 3699)
Indi
rect
2
3
4
5
> 5
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Comparing formal definitionsComparing formal definitions
Relatively small proportion of Relatively small proportion of relatarelata in common in common between equivalent concepts from between equivalent concepts from NCItNCIt and and SNOMED CTSNOMED CTLarge number of primitive concepts in Large number of primitive concepts in NCItNCIt and and
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SNOMED CT (70SNOMED CT (70--80%)80%)Insufficient for effectively comparing definitionsInsufficient for effectively comparing definitions
Could not be used for validating the mapping provided Could not be used for validating the mapping provided by the UMLSby the UMLS
[Bodenreider, KRMED 2008][Bodenreider, KRMED 2008]
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ExercisesExercises
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Exercise #1Exercise #1
Check the equivalence (shared Check the equivalence (shared relatarelata) between ) between these 2 concepts:these 2 concepts:
NCI Thesaurus: N:Endocrine pancreas disorderNCI Thesaurus: N:Endocrine pancreas disorderSNOMED CT: S:Disorder of endocrine pancreasSNOMED CT: S:Disorder of endocrine pancreas
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Exercise #2Exercise #2
Find a correspondence in SNOMED CT for the Find a correspondence in SNOMED CT for the LOINC term: LOINC term: Sodium:SCnc:-Pt:SerSodium:SCnc:-Pt:Ser//Plas:QnPlas:Qn[the molar concentration of sodium is measured in [the molar concentration of sodium is measured in the plasma (or serum), with quantitative result]the plasma (or serum), with quantitative result]
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Axis ValueComponent Sodium
Property SCnc – Substance Concen-tration (per volume)
Timing Pt – Point in time (Random)
System Ser/Plas – Serum or Plasma
Scale Qn – Quantitative
Method --
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Comments on exercise #2Comments on exercise #2
Difficult in the absence of a search mechanism on Difficult in the absence of a search mechanism on the values of the relationsthe values of the relationsLarge number of underspecified descriptions in Large number of underspecified descriptions in SNOMED CTSNOMED CT
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2 separate concepts for plasma and serum 2 separate concepts for plasma and serum concentrations of sodium in SNOMED CTconcentrations of sodium in SNOMED CTProperty, time and scale not represented in Property, time and scale not represented in SNOMED CTSNOMED CT
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Thinking outside the integration boxThinking outside the integration boxg gg g
The Butte approachThe Butte approach
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Integrating genomic and clinical dataIntegrating genomic and clinical data
Genomicdata
Clinicaldata
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CodedCodeddischargedischargesummariessummaries
LaboratoryLaboratorydatadata
UpregulatedUpregulatedgenesgenes
DiseasesDiseases(extracted from text)(extracted from text)
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ReferencesReferences
Dudley J, Butte AJ "Enabling integrative genomic Dudley J, Butte AJ "Enabling integrative genomic analysis of highanalysis of high--impact human diseases through impact human diseases through text mining." text mining." Pac Pac SympSymp BiocomputBiocomput 2008; 5802008; 580--9191Chen DP, Weber SC, Chen DP, Weber SC, ConstantinouConstantinou PS, Ferris TA, PS, Ferris TA,
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Lowe HJ, Butte AJ "Novel integration of hospital Lowe HJ, Butte AJ "Novel integration of hospital electronic medical records and gene expression electronic medical records and gene expression measurements to identify genetic markers of measurements to identify genetic markers of maturation." maturation." Pac Pac SympSymp BiocomputBiocomput 2008; 2432008; 243--5454Butte AJ, "Medicine. The ultimate model Butte AJ, "Medicine. The ultimate model organism." organism." ScienceScience 2008; 320: 5874: 3252008; 320: 5874: 325--77
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MedicalMedicalOntologyOntologyResearchResearch
Contact:Contact: [email protected]@nlm.nih.gov
Olivier Olivier BodenreiderBodenreider
Lister Hill National CenterLister Hill National Centerfor Biomedical Communicationsfor Biomedical CommunicationsBethesda, Maryland Bethesda, Maryland -- USAUSA
Co ac :Co ac :Web:Web:
o v e @ . .govo v e @ . .govmor.nlm.nih.govmor.nlm.nih.gov