1. Dewey Summaries as Multilingual Linked Data Dewey Breakfast/Update ALA Annual July 11, 2009

2. Linked Data principles Three rules 1.Use http-URIs as names for things (identification) 2.When someone looks up a URI, provide useful information (dereferenceability) 3.Include links to other URIs (relationships) Maxims “Raw data now!” (TBL) Being able to ask new question about data Adding information collaboratively

3. Linked Open Data cloud

4. Requirements for publishing Linked Data -Identification -Every data entity has a URI -Access -HTTP as protocol (established infrastructure: WWW) -User agent indicates which data formats it accepts -Representation -for machines -RDF as data model -SKOS, Dublin Core, ccREL, etc. as vocabularies -for humans -HTML, etc. -“Openness” of the data set

5. Use Cases: Basic web lookup “If someone has the URI of that thing, what relationships to what other objects is it useful to know about?” (Tim Berners-Lee) A web page for every class of the Dewey Summaries, e.g.:

6. Use Cases: Basic linking Example: Dublin Core metadata Petrology. Huang, Walter Ta, 1924- 552 Use of a link (URI) instead of arbitrary text

7. Use Cases: Basic linking Example: Dublin Core metadata Petrology. Huang, Walter Ta, 1924- Use of a link (URI) instead of arbitrary text

8. Service: Dewey Summaries as Linked Data -External summaries of DDC 22 -Main Classes, Divisions, Sections -Accessible -as RDF data or HTML web pages -in 9 languages -Reusable -by anyone -under terms of Creative Commons BY-NC-ND 3.0 license

9. Demo: Dewey Summaries as Linked Data http://dewey.info/class/641/ http://dewey.info/class/641/about.rdf http://dewey.info/class/641/about.en http://dewey.info/class/641/about.sv http://dewey.info/class/641/2009/06/about.ar.html http://dewey.info/class/641/2009/01/about.ar.rdf

10. HTML view across all versions in all languages

11. Data view across all versions in all languages

12. HTML view of all versions in a specific language http://dewey.info/class/641/about.sv

13. Data view of a specific version in a specific language http://dewey.info/class/641/2009/06/about.ar.rdf

14. And it works on my BlackBerry...

15. Thank you! What would you like to do with this? Ideas for new use cases? Other comments, suggestions? panzerm@oclc.org