1 / 13

The Resource Description Framework

The Resource Description Framework. And its application to thegateway.org. Where we’ll go… . Brief tour of thegateway.org Current state of the project GEMcat 4.0 GEM2 RDF. www.thegateway.org. A really big experiment in self-cataloging.

brendon-mawe
Download Presentation

The Resource Description Framework

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Resource Description Framework And its application to thegateway.org

  2. Where we’ll go… • Brief tour of thegateway.org • Current state of the project • GEMcat 4.0 • GEM2 • RDF

  3. www.thegateway.org • A really big experiment in self-cataloging. • A consortial effort to provide a directory to quality educational materials on the web.

  4. Content providers and consortium members catalog and embed metadata Register URIs with GEM Harvester crawls the metadata, builds database. GEM1 data is html meta tags. Descriptors based on Dublin Core + GEM qualifiers: www.geminfo.org/Workbench/Metadata Behind the scenes:

  5. Next steps: • Implement z39.50 • Blue Angel • Implement new data format • RDF • Release new cataloging module • GEMcat 4?

  6. value of the property property of stuff Stuff in the world Subject Predicate Object What is RDF? • A model for representing metadata • A syntax for encoding and transporting this metadata.

  7. So what does it look like? <rdf:Description rdf:about = "http://someplace.edu"> <interest_level> Really Interesting </interest_level> </rdf:Description> Subject Predicate Object And that is the entire model.

  8. Dublin Core in RDF <rdf:Description rdf:about="http://some_URI”> <dc:title>Expressing Dublin Core with RDF</dc:title> <dc:creator> Eric Miller </dc:creator> <dc:subject> Dublin Core; RDF; XML </dc:subject> <dc:publisher> Dublin Core Metadata Initiative </dc:publisher> <dc:contributor>Dublin Core Data Model Working Group </dc:contributor> <dc:date> 1999-07-01 </dc:date> <dc:format> text/html </dc:format> <dc:language> en </dc:language> </rdf:Description>

  9. http://some_uri dc:creator gem:email gem:person Jon Jab jonjab@u.wash.edu Well, there are complications… • Structured entities <rdf:Description rdf:about = "http://some_uri"> <dc:creator> <rdf:Description> <gem:person value="Jon Jab" /> <gem:email value="jonjab@u.wash.edu" /> </rdf:Description> </dc:creator> </rdf:Description>

  10. Same approach for Statements about Statements <dc:relation> <gem:isChildOf> <rdf:value> http://www.nytimes.com/learning/ </rdf:value> <rdfs:label> Lesson Plan Archive </rdfs:label> </gem:isChildOf> </dc:relation>

  11. Controlled language & encoding schemes <rdf:Description rdf:about="s3"> <gem:ERIC rdf:about="http://128.208.100.148/ thesauri/eric?Secondary_Education"> <rdf:value>Secondary Education</rdf:value> </gem:ERIC> </rdf:Description> <gem:recordcreated> <gem:iso8601_1988> <rdf:value>1999-09-02T13:35:29-5:00</rdf:value> </gem:iso8601_1988> </gem:recordcreated>

  12. Eventually, things get silly…

  13. Links • rdf parser from w3.org • RDF Model and Syntax Specification • RDF Schema Specification 1.0 • RDF homepage • Expressing Qualified Dublin Core in RDF • The Gateway to Educational Materials • GEMinfo (about the Gateway) This presentation: www.whatsgrowing.com/jon/docs/asis_rdf.ppt

More Related