W3C and RDF

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W3C and RDF
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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
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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, ...

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RDF Components

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

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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

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RDF Model Primitives
Resource
Property
Value
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Simple Example
Resource
Author
Pat
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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

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RDF Model Example 1
URIR
Title
CIMI Presentation
Creator
Pat Stevens
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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
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RDF Model Example 2
URIR
Title
CIMI Presentation
Creator
Eric Miller
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Schema Vocabularies

• Enables communities to share machine readable
  tokens and locally define human readable labels.

dcCreator
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Relationships among vocabulary elements
URIR
msKgrip
John Smith
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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/