W3C and RDF. Why OCLC is a W3C Member Access to networked information resources –the browser and online access –the breath and depth of networked information.

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Presentation transcript:

W3C and RDF

Why OCLC is a W3C Member Access to networked information resources –the browser and online access –the breath and depth of networked information resources –new ways of publishing Less obvious ways –enhanced interoperability –restructuring of business relations –a transformational way in how goods and services are delivered The Web is transforming our environment

RDF Objectives Resource Description Framework Machine understandable metadata Support structured values Support metadata bureaus Encourage authenticated metadata Base for a variety of descriptions: –cataloging, privacy, accessibility, IPR,...

RDF Components Formal data model Syntax for interchange of data Schema Type system (schema model) Syntax for machine-understandable schemas Query and profile protocols

RDF Data Model Imposes structural constraints on the expression of application data models – for consistent encoding, exchange and processing of metadata Enables resource description communities to define their own semantics Provides for structural interoperability

RDF Model Primitives Resource Property Value Resource Statement

Simple Example Resource Author Pat

RDF Syntax RDF Model defines a formal relationships among resources, properties and values Syntax is required to... –Store instances of the model into files –Communicate files from one application to another W3C XML eXtensible Markup Language –

RDF Model Example #1 URI:R CIMI Presentation Title Creator dc: Pat Stevens

RDF Syntax Example URI:R CIMI Presentation Title Creator dc: Pat Stevens <RDF xmlns = xmlns:dc = CIMI Presentation Pat Stevens

RDF Model Example #2 URI:R Eric Miller URI:ERIC oclc.org Pat Stevens OCLC bib: bib:Aff bib:Name URI:OCLC CIMI Presentation Title Creator dc:

Schema Vocabularies Enables communities to share machine readable tokens and locally define human readable labels. dc:Creator Nom rdfs:label Author rdfs:label $100 $a rdfs:label

Relationships among vocabulary elements URI:R John Smith ms:Kgrip dc:Creatorms:Kgrip rdfs: subPropertyOf rdfs:label Key Grip dc:Creator

RDF Information W3C RDF Model and Syntax Speciation –Recommendation Status Feb 24, 1999 W3C RDF Schema Specifications –Proposed Recommendation Status Mar 4, 1999 W3C RDF Home Page –