lead beneficiary: aristotle university of thessaloniki – auth (professor demos angelides) iris...
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LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
The IRIS Risk Knowledge Portal
Georgios Meditskos, Nick Bassiliades Logic Programming & Intelligent Systems group
Dept. of InformaticsAristotle University of Thessaloniki, Greece
http://irisportal.csd.auth.gr
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Outline• Introduction• The Risk Ontology• The Risk Knowledge Portal– Architecture– Functionality– Implementation
• Demonstration• Next Steps
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
The Role of Semantics in IRIS
• All the variables associated with the Risk Assessment Process are represented in terms of a Risk Ontology– An upper-level schema that describes terms, relationships
and restrictions of risk identification and assessment• It is a formal representation of the IRIS Risk Glossary
that is used for defining Risk Case Studies (Risk Identification)
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Benefits of Semantics• Formal vocabulary of terms publicly available for use by
different organizations– integration of risk assessment practices from
different domains• Derivation of implicit/hidden relationships through reasoning
– semantic integration and consistency checking using state-of-the-art ontology reasoners
• Ability to “link” risk terms with existing semantic descriptions in the Web of Data– building a network of semantically
interconnected concepts (Linked Data)
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
The Role of the Risk Knowledge Portal• To better manage and disseminate the case studies of the risk registry
– Simplifies the definition and management of risk knowledge• form-based editing vs. Microsoft Excel worksheets• easier representation of risk relationships
– Searching/browsing capabilities based on semantic relationships• To make the underlying risk registry public
– A common web reference for risk management– Continuous updating/refinement of risk knowledge
• To provide basic social features for the active contribution of users to the risk definition/refinement process– comments, discussions, etc.
• Future -> Integrator for Risk Assessment
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Outline• Introduction• The Risk Ontology• The Risk Knowledge Portal– Architecture– Functionality– Implementation
• Demonstration• Next Steps
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Ontology Requirements• Should be able to represent all the needed terms,
relationships and restrictions of the domain– e.g. case studies, risk cases, risk variables and their
relationships• Should be simple– a complex ontology affects reasoning and querying
performance• an important requirement in our case since there is a need for
online (real-time) reasoning tasks
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
The Ontology• OWL 2 RL Language• 27 classes• 31 properties• A revision of a previous risk ontology (2010)– modified to meet the requirements of the portal
http://irisportal.csd.auth.gr/ontology/iris.owl
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Top-level Class Hierarchy
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Case Study• There are no subclasses• Properties– acronym– editor– hasRiskCases ()– version– versionDate
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Risk Case• Properties– appearsInCaseStudy ()– code– consistsOf (Risks) ()– hasFactors ()– hasComponents ()– hasMechanisms ()– hasImpacts ()– editor
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Risk• Properties– belongsTo (Risk Case) ()– hasComponent ()– hasFactor ()– hasImpact ()– hasMechanism ()– rickClass (Category)
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Risk Variable• Properties– isVariableOf (Risk) ()– with subproperties• isFactorOf• isImpactOf• isComponentOf• isMechanismOf
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Category• There are no subclasses• Specific–only instances
(owl:oneOf)• It is used in order to define
instances relevant to categories
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Basic Ontology Restrictions• A Case Study may have zero or more Risk Cases– Each Risk Case belongs to a single Case Study
• A Risk Case has one or more Risks– Each Risk belongs to a single Risk Case
• A Risk has one or more Risk Variables (Factors, Components, Mechanisms, Impacts)– A Risk Variable may belong to multiple Risks
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Outline• Introduction• The Risk Ontology• The Risk Knowledge Portal–Architecture– Functionality– Implementation
• Demonstration• Next Steps
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
• Risk Knowledge Portal– Web application (.NET 4 Web Forms)
Risk Ontology Service
Web Service(SOAP Messages)
UserIRIS Risk Knowledge Portal
Triple Store(Sesame)
Reasoner(OWLIM)
Architecture
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Risk Ontology Service• A WSDL Web Service (in JAVA) that supports operations for
querying and updating the risk ontology• Front-end
– receives SOAP messages from the IRIS Portal• Back-end
– it communicates with Sesame (the triple store) and OWLIM Lite (rule-based ontology reasoner)
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Outline• Introduction• The Risk Ontology• The Risk Knowledge Portal– Architecture
– Functionality– Implementation
• Demonstration• Next Steps
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Overview• User accounts
– role-based authentication
• Risk Ontology Management
• Faceted Browsing/Filtering/Searching
• Favorites
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
User Roles• Three role-based security levels
– Users: • limited access • they are allowed to search, browse/navigate the risk ontology • able to comment, share ideas and participate in discussions with other users (not
implemented yet)
– Knowledge Engineers: • have all the privileges of Users • they are also capable of posting new case studies and risk cases or updating the ones that
they have submitted• they are not allowed to modify posts of other users
– Administrators: • have all the privileges of Users and Knowledge Engineers • they are also capable of modifying the entire risk ontology • they are responsible for the management of the user accounts (not implemented yet)
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Posting New Risks• Two types of post– New Case Studies– New Risk Cases
• with their risk variables
• In order to post a Risk Case, the Case Study should already exist– each Risk Case must belong to a single Case Study
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Faceted Searching/Browsing• Users are able to search and browse
– Case Studies– Risk Case– Risk Variable
• For each type, different facets/filters may be defined– e.g. give me all the Case Studies that are associated (indirectly) with a
specific Risk Variable– A dynamic SPARQL query is generated
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Favorites• Users can add Case Studies, Risk Cases, Risks and Risk
Variables to their favorites– easy access– keep track of updates and activities
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Outline• Introduction• The Risk Ontology• The Risk Knowledge Portal–Architecture– Functionality– Implementation
• Demonstration• Next Steps
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Repository Queries• Dynamically generated SPARQL 1.1 queries based on
users activity– searching, filtering, browsing the ontology
• Queries are submitted via the Risk Ontology Service to OWLIM– it supports non-trivial inference with tens of millions of
statements
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Sample SPARQL Query 1 Retrieve all Case Studies
SELECT DISTINCT ?ID ?Acronym ?Description ?Editor ?Version ?VersionDate WHERE {
?ID rdf:type iris:CaseStudy; iris:acronym ?Acronym; iris:description ?Description; iris:version ?Version; iris:versionDate ?VersionDate; iris:editor ?Editor.
}
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Sample SPARQL Query 2
SELECT DISTINCT ?CaseStudy ?Acronym ?Description ?Editor ?Version ?VersionDate WHERE { ?CaseStudy rdf:type iris:CaseStudy; iris:acronym ?Acronym; iris:description ?Description; iris:version ?Version; iris:date ?date; iris:versionDate ?VersionDate; iris:editor ?Editor. ?CaseStudy iris:hasRiskCases ?RiskCase0. ?RiskCase0 iris:hasVariables iris:component622427b2-a64a-4e0a-83e4-83c4b309b618. }
variable id
Retrieve all Case Studies that are related to the “blades deflections” variable
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Updates
• Currently OWLIM does not support the SPARQL 1.1 UPDATE construct– is used to update the ontology via SPARQL
• Will be available in the next release• We use the native OWLIM API for adding and
removing triples
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Custom Rules• Ability to enhance the reasoning results with custom
inferences• OWLIM supports the definition of rules using a triple-
based rule language• Both OWL entailments and custom rules are
translated into JAVA byte-code
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Custom Rule ExampleId: AssociateRiskCaseAndComponents
x <rdf:type> <iris:RiskCase>x <iris:consistsOf> rr <iris:hasComponent> c
-------------------------------x <iris:hasComponents> c
riskCase_1 consistsOf Risk_1
Component_1hasComponent
hasComponents
Component_n
hasComponent
hasComponents
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Summary of Technologies• Portal– ASP.NET 4 Web forms– jQuery (Ajax-based communication)– SQL SERVER 2008 R2 (for the social features)
• Risk Ontology Service– JAVA 6– Sesame (triple store)– OWLIM Lite 4 (reasoner)– SPARQL 1.1– Apache Tomcat
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Outline• Introduction• The Risk Ontology• The Risk Knowledge Portal–Architecture– Functionality– Implementation
• Demonstration• Next Steps
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Outline• Introduction• The Risk Ontology• The Risk Knowledge Portal–Architecture– Functionality– Implementation
• Demonstration• Next Steps
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Risk Assessment Calculation• Portal will become the integrator of various risk
assessment tools• The following calculations are required to assess
overall risk probability– “summation” of the probability of occurrence of the
components– “summation” of the probability of occurrence of risk
variables occurrence, i.e. factors, components, mechanisms, and impacts
LEAD BENEFICIARY: ARISTOTLE UNIVERSITY OF THESSALONIKI – AUTh (Professor Demos Angelides)
IRIS SUMMER ACADEMY 2011hosted by VCE
03 – 07 September 2011, Zell am See, Austria
Risk Assessment• The ontology will evolve in order to “host” data for
probabilities and various other numerical data values– Will be re-inserted from older ontology versions
• Specialized custom rules will be used to summate the values provided by the users or other tools
• Special APIs will be used to communicate with these other tools (e.g. Matlab)
• Database will hold past risk assessment cases if needed