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W3C and RDF

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Creator. dc: dc: 'Pat Stevens' RDF xmlns = 'http: ... Creator. dc: dc: Schema Vocabularies ... dc:Creator. RDF Information. W3C RDF Model and Syntax Speciation ... – PowerPoint PPT presentation

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Title: W3C and RDF


1
W3C and RDF
2
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

Coals to Newcastle
3
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, ...

4
RDF Components
  • Formal data model
  • Syntax for interchange of data
  • Schema Type system (schema model)
  • Syntax for machine-understandable schemas
  • Query and profile protocols

5
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

6
RDF Model Primitives
Resource
Property
Value
7
Simple Example
Resource
Author
Pat
8
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
  • http//www.w3.org/XML

9
RDF Model Example 1
URIR
Title
CIMI Presentation
Creator
Pat Stevens
10
RDF Syntax Example
URIR
Title
CIMI Presentation
Creator
Pat Stevens
ltRDF xmlns http//www.w3.org/TR/WD-rdf-syntax
xmlnsdc http//purl.org/dc/element
s/1.0/gt ltDescription about URIRgt
ltdcTitlegt CIMI Presentation lt/dcTitlegt
ltdcCreatorgt Pat Stevenslt/dcCreatorgt
lt/Descriptiongt lt/RDFgt
11
RDF Model Example 2
URIR
Title
CIMI Presentation
Creator
Eric Miller
12
Schema Vocabularies
  • Enables communities to share machine readable
    tokens and locally define human readable labels.

dcCreator
13
Relationships among vocabulary elements
URIR
msKgrip
John Smith
14
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
  • http//www.w3.org/RDF/
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