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RDFa Primer Bridging the Human and Data webs

RDFa Primer Bridging the Human and Data webs. Presented by: Didit (2008-22485). RDFa introduction. RDFa, Resource Description Framework in attribute Is a set of extension to XHTML now part of W3C recommendation Have a purpose to augment web page visual data with machine readable hints

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RDFa Primer Bridging the Human and Data webs

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  1. RDFa PrimerBridging the Human and Data webs Presented by: Didit (2008-22485)

  2. RDFa introduction • RDFa, Resource Description Framework in attribute • Is a set of extension to XHTML • now part of W3C recommendation • Have a purpose • to augment web page visual data with machine readable hints • to reduce the gap between what user and programs understand from a web page

  3. RDFa background • In a traditional technology (ordinary html page) there are a large gap between what human and programs understand

  4. RDFa technology • RDFa used a generalize attributes from XHTML meta and link elements • This allow user to annotate XHTML markup with semantic

  5. RDFa technology • Set of attribute provide by RDFa • about: a URI specifying the resource of the metadata • rel & rev: specifying a relationship with another resource • href, src, resource: specifying the partner resource • property: specifying a property for the content of an element

  6. RDFa technology • Content: optional attribute that override the content of the elements when using the property attribute • Datatype: optional attribute that specifies the datatype of text specified • Typeof: optional attribute that specifies the RDF type of subject

  7. RDFa example • Consider Alice a bloger who wants to declare her content to be freely reusable as long as she receive due credit when her article are cited

  8. RDFa example • Labeling the title and author • Use property and attribute • Import existing DC vocabulary to express title and author

  9. RDFa example • Expressing multiple items per page

  10. RDFa example • Nesting cause overriding of the outer value

  11. RDFa example • Describing contact information

  12. RDFa example • Describing social networks

  13. Benefit of RDFa • Publisher independence • Data reuse • Self containments • Schema modularity • Evolvability

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