metadata, resources, and the rdf 김민수 chapter 1. creating the sementic web with rdf2 overview...
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Metadata, Resources, Metadata, Resources, and the RDFand the RDF
김민수
Chapter 1
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Creating the Sementic Web with RDF 2
OverviewOverview
KnowledgeRepresentation
LibraryMetadata
R
D
F
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Creating the Sementic Web with RDF 3
OverviewOverview
XMLRDF
descriptionMetadata
Profile
structured
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Creating the Sementic Web with RDF 4
OverviewOverview Language example
SyntaxVocabulary
•mapping between symbol and concept
Semantics•meaning of the vocabulary
RDF – rules for creating semantics RDF Schema – a way of creating vocabularies
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Creating the Sementic Web with RDF 5
OverviewOverview
Knowledge RepresentationAssuming there are universal ways of represe
nting knowledge in vocabulary and structureCentrally determined framework
RDFUsing the same structure but allowing own vo
cabularyDecentralized scheme
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Creating the Sementic Web with RDF 6
What Is RDF?What Is RDF?
The format which can represent and transport informationXML 은 structure 밖에 표현하지 못한다
The level above XML determines how the information is interpreted
A way to express relations between objectsgraph theory
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Creating the Sementic Web with RDF 7
What Is RDF?What Is RDF?
Describing Data: The Concept of Graphs
Node 1 Node 2
Property nameResource Property value
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Creating the Sementic Web with RDF 8
The statement, “Napoleon is emperor”, in RDF.<?xml version=“1.0”?>
<rdf:RDF xmlns:rdf=“http://www.w3.org/1999/02/22-rdf-syntax-ns#” xmlns:n=“http://www.historybuff.org/emperor/schema/”>
<rdf:Description about=“http://www.historybuff.org/Napoleon/”>
<n:emperor rdf:resource=“http://www.historybuff.org/France/Emperor/” />
</rdf:Description>
</rdf:RDF>
http://www.historybuff.org/Napoleon/
http://www.historybuff.org/France/Emperor/
http://www.historybuff.org/emperor/schema/
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Creating the Sementic Web with RDF 9
What Is RDF?What Is RDF?
RDF VocabulariesWhere to define the terms for property names,
property values and constraints•RDF providing graph structure(format)•Not names and properties
RDF Schema
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Creating the Sementic Web with RDF 10
What Is RDF?What Is RDF?
RDF Schema잘 만들지 않으면 Ambiguous 할 수 있다
•Which suit? Cloth or lawsuit?
Written in a specific languageLoad the schema at the URI when there is an
unknown term• cf. UAProf(User Agent Profile)
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Using RDF to Using RDF to Annotate Text and Annotate Text and
PhotosPhotos
Chapter 2
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Creating the Sementic Web with RDF 12
OverviewOverview
Annotateddocument
KnowledgeBase
Amaya
rdfpic
Protégé-2000
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Creating the Sementic Web with RDF 13
Annotation of TextAnnotation of Text
AmayaThe browser/editor from the W3C
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Creating the Sementic Web with RDF 14
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Creating the Sementic Web with RDF 15
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Creating the Sementic Web with RDF 16
Annotation of PhotoAnnotation of Photo
rdfpic
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Creating the Sementic Web with RDF 17
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Creating the Sementic Web with RDF 18
Protégé-2000Protégé-2000
Making a statement about knowledge Build an ontology