presentation on named graphs at the RDF next step workshop

1. http://www-sop.inria.fr/edelweiss/fabien/docs/w3c/rdfsource/rdfsource.html http://purl.org/dc/elements/1.1/creator http://purl.org/dc/elements/1.1/title http://ns.inria.fr/fabien.gandon/foaf#me RDF Source http://xmlns.com/foaf/0.1/name http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://xmlns.com/foaf/0.1/mbox mailto:fgandon@inria.fr Fabien Gandon http://xmlns.com/foaf/0.1/Person http:// namethat graph! Fabien Gandon, Olivier Corby, ,

2. preaching to the choir ?!?

3. RDF needs necktiesseems more controversial

4. provenance, source, origin, author,… creation date, age, use-by date,… accuracy, authentication, certification, validity, … context, assumption, modality, … dependencies, disjunction, negation, … access rights, copyrights, … location, society, culture, … ...informational context

5. wecanquery… PREFIX dc: <http://purl.org/dc/elements/1.1/> PREFIX foaf: <http://xmlns.com/foaf/0.1/> SELECT * WHERE { GRAPH ?gphdoc { ?docdc:title ?title . ?docdc:creator ?author } GRAPH ?gphauthor { ?authorfoaf:name ?name } }

7. rdf:ID still at triple level and still no link

8. document URI, ad-hoc, bad practice… naming is currently done outside RDF #me  subject #name predicate #S #me #name "fabien" object "fabien" #me  subject #name predicate #me #S "fabien" #name rdf:ID="S" object "fabien" ≠

9. named graphs, provenance and trust [Carroll, Bizer, Hayes, Stickler, 2005] communicate assertional intent and sign assertions embody social acts with some record name with URIs & graph RDFS class :G1 {_:Monica ex:name "Monica Murphy" . _:Monica ex:email <mailto:monica@murp.hy> . :G1 pr:disallowedUsagepr:Marketing } :G2 { :G1 ex:author :Chris . :G1 ex:date "2003-09-03"ˆˆxsd:date }

10. nested typed graphs [Sowa, 84] [Mugnier & Chein, 96] [Chein & Mugnier, 08] “A typed nested conceptual graph and a coreference link (dashed line)” [Genest & Salvat, 98]

11. RDF/XML syntax extension [Gandon, Bottolier, Corby, Durville , 2007] <rdf:Descriptionrdf:about="http://www- sop.inria.fr/edelweiss/fabien/docs/w3c/rdfsource/rdfsource.html"cos:graph="http://www.w3.org/biblio" > <dc:title>RDF Source</dc:title> <dc:creator> <foaf:Personrdf:about="http://ns.inria.fr/fabien.gandon/foaf#me" cos:graph="http://www.inria.fr/hr" > <foaf:name>FabienGandon</foaf:name> <foaf:mboxrdf:resource="mailto:fgandon@inria.fr"/> </foaf:Person> </dc:creator> </rdf:Description>

12. before http://.../rdfsource.html dc:title dc:creator http://...#me RDF Source foaf:mbox rdf:type foaf:name mailto:fgandon@inria.fr Fabien Gandon foaf:Person

13. after http://.../rdfsource.html dc:title http://www.w3.org/biblio dc:creator http://www.w3.org/biblio http://...#me RDF Source foaf:mbox rdf:type foaf:name http://www.inria.fr/hr http://www.inria.fr/hr http://www.inria.fr/hr mailto:fgandon@inria.fr Fabien Gandon foaf:Person

14. e.g. social tagging sioc:has_creator http://.../tag23 #buttersg88 dc:date 11/03/2008 “nature” sioc:container http://www.flickr.com

15. e.g. concurrent hypotheses context 2 context 1 context 3 context 6 context 4 context 5  

16. e.g. tracing and backtracking source 2 source 1 source 1,2,3,4 source1,2,3 service 3 service 4

17. e.g.… temporal aspects in querying and reasoning. context of knowledge extraction (NLP). capture of points of view. distributed storage and query routing. security etc.

18. names, plllleaaase,@TODO blank nodes, one triple in several graphs, backward compatibility, rdf:Graph & rdf:GraphStore// comments - RDF 1.1 not RDF 2.0 - Follow your nose for RDF and named graphs - RDF meta-model must remain domain independent to standardize a best practice there must be a practice in the first place Fabien Gandon, Olivier Corby, ,