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[semantic wev] Introduction to RDF(Resource Description Framework) 평가D별로예요

..PAGE:1Introduction to RDFthe “Resource Description Framework”..PAGE:2RDF Model and Syntax SpecificationResource Description Framework(RDF) Model and syntax SpecificationDocument infoRDF model and syntax Working GroupRecommendation / 1999년 2월 22일http://www.w3.org/TR/REC-rdf-syntaxDocument publisherOra Lassila la@research.nokia.com, Nokia Research CenterRalph R. Swick swick@w3.org, World Wide Web ConsortiumReferenceResource Description Framework(RDF) Schema Specificationhttp://www.w3.org/TR/1998/WD-rdf-schema-19989814/RDF Made Easy- http://www.ccil.org/~cowan/XML/RDF-made-easy.html..PAGE:3RDF Model and Syntax SpecificationKey Points웹 기반의 Metadata 기술과 교환을 위한 구조 정의XML을 기반으로 Metadata의 의미, 문법 그리고 구조에 대한 공통의 규약을 지원하는 메커니즘 제공프로그램들 간에 또는 웹을 통해 Metadata를 교환할 수 있는 단일하고 상호 호환되는 수단 제공사람이 읽을 수 있고 기계가 이해 가능한 정의 도구 제공응용 분야자원 검색, 자원 목록, 지능 소프트웨어 에이전트, 내용 순위 부여 및 평가, 디지털 서명, 지적 재산권 보호 등..PAGE:4RDF Model and Syntax Specification기본적인 RDF ModelResourceRDF 표현으로 기술된 모든 웹 객체URI에 의해 지정Property자원을 기술하기 위해 사용되는 측면, 특성, 속성, 관계Statement자원 + 값을 가지는 PropertySubject, Predicate, ObjectSubjectObjectpredicate..PAGE:5ModelA model is a set of statementsStatement := (predicate,subject,object)Predicate is a resourceSubject is a resourceObject is either a resource or a literalObject = Predicate(Subject)..PAGE:6ResourceFrom RFC 2396:Resource A resource can be anything that has identity. Familiar examples include an electronic document, an image, a service (e.g., "today's weather report for Los Angeles"), and a collection of other resources. Not all resources are network "retrievable"; e.g., human beings, corporations, and bound books in a library can also be considered resources. The resource is the conceptual mapping to an entity or set of entities, not necessarily the entity which corresponds to that mapping at any particular instance in time. Thus, a resource can remain constant even when its content---the entities to which it currently corresponds---changes over time, provided that the conceptual mapping is not changed in the process...PAGE:7ResourceA resource is identified by a URIThe resource identified by a URI may be abstract - I.e. not network retrievableResource is distinct from entity resolved at any particular timehttp://www.openhealth.org/RDF/..PAGE:8Edge Labeled Directed Graphsfoobarbazbopbingisahaswantsplays(isa, foo, bar)(has, bar, baz)(plays, baz, bop)(wants, baz, bing)..PAGE:9Node labeled Directed Graphrootfoobarbazhrefxyxzelementelementelementattributeattributeattributeattributeattributeaaa13..PAGE:10ModelExample..PAGE:11Example..PAGE:12RDF Schema SpecificationResource Description Framework(RDF) Schema SpecificationDocument infoRDF Schema Working GroupProposed Recommendation / 1999년 3월 3일http://www.w3.org/TR/PR-rdf-schemaDocument publisherDan Brickley, University of BristolR.V.Guha, NetscapeReferenceRDF Model and Syntax Specificationhttp://www.w3.org/TR/REC-rdf-syntax/Dave Beckett’s RDF Resources- http://www.cs.ukc.ac.uk/people/staff/djb1/research/metadata/rdf.shtml..PAGE:13RDF Schema SpecificationKey PointsRDF Model and Syntax Specification 은 단지 웹 자원들과 그들간의 관계만을 기술하는 모델을 제공Property 선언이나 Property 와 다른 Resource 간의 관계를 기술하는메커니즘을 제공하기 위함응용 영역PICS(The Platform for Interent Content Selection Labels)URL 정보를 가지고 찾을 수 없는 페이지에 대한 등급화웹 MetadataDublin Core 와 같은 descriptive vocabulary 제공사이트 맵과 다른 네비게이션 툴들노드들의 클래스와 Property들, 그리고 그들 간의 관계를 표현할 수 있는 RDF용 사이트 맵 분류 메커니즘 제공P3PPrivacy Practice Description에 대한 형식적인 구조 기술..PAGE:14RDF Schema And XML SchemaRDF Schemas might be contrasted with XML DTDs and XML Schemas. Unlike an XML DTD or Schema, which gives specific constraints on the structure of an XML document, an RDF Schema provides information about the interpretation of the statements given in an RDF data model.While an XML Schema can be used to validate the syntax of an RDF/XML expression, a syntactic schema alone is not sufficient for RDF purposes. RDF Schemas may also specify constraints that should be followed by these data models.Future work on RDF Schema and XML Schema might enable the simple combination of syntactic and semantic rules from both Schema-Arch...PAGE:15RDF SchemasSemantic networks on the WebNodes are identified by URIsrdfs:Classrdfs:Propertyrdfs:subClassOfrdf:type..PAGE:16RDF Schemas..PAGE:17Simplified Healthcare Schema..PAGE:18Simplified Healthcare Schema..PAGE:19Healthcare Schema..PAGE:20Describing things with RDFJonathan BordenAn XSLT based parser which converts an arbitrary XML document into RDF Statements..PAGE:21Describing things with RDFhttp://www.openhealth.org/RDF/rdfExtractify.xslAn XSLT based ...Jonathan Bordendescriptionauthor..PAGE:22RDF StatementsJonathan Borden..PAGE:23RDF Collectionsrdf:Bag - an unordered collection that may have repeated membersrdf:Seq - an ordered collectionrdf:Alt - a collection of alternates..PAGE:24rdf:BagThe first member

의/약학| 2001.12.05| 26페이지| 1,000원| 조회(682)

xml, RDF, semantic

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