First position statement for Linked Open Services at SemData@ESWC Workshop

1. Linked Data Meets Services and Processes: Linked Open Services Barry Norton, RetoKrummenacher SemData@ESWC, May 30, 2010

2. Agenda State of the art in combination of Linked Open Data and services Services over the LOD Cloud (SWS) Service descriptions in the LOD Cloud Why not just SWS? Linked Open Services Outlook 2 Linked Open Services Dr. Barry Norton 30.05.2010

3. State of the Art – GeoNames.org Linked Open Services Dr. Barry Norton 3 30.05.2010

4. State of the Art – GeoNames.org Services Linked Open Services Dr. Barry Norton 4 30.05.2010

5. State of the Art – GeoNames.org Services Linked Open Services Dr. Barry Norton 5 30.05.2010

6. State of the Art – GeoNames.org Weather Service Linked Open Services Dr. Barry Norton 6 30.05.2010

7. State of the Art – GeoNames.org Weather Service {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Linked Open Services Dr. Barry Norton 7 30.05.2010

8. State of the Art – GeoNames.org Weather Service {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Linked Open Services Dr. Barry Norton 8 30.05.2010

9. State of the Art – Combination of LOD & Services Last SemData Workshop presented ‘Linked Services’, which are the exposure of service descriptions as LOD Service model based on ‘Minimal Service Model’, which is “SAWSDL in RDF”: ‘De-XMLised’ (WSDL) RPC model in RDF(S) Ontology/vocabulary classification of inputs/outputs Pointer to ‘lifting and lowering schemas’ turn XML-based messages into instances of these classes Linked Open Services Dr. Barry Norton 9 30.05.2010

10. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Why not just SWS? RDFS WeatherObservation XSPARQL Report CloudReport WindReport RDF [ rdf:value "30“^^xsd:int; # lifting rdf:type :WindReport #classification] Linked Open Services Dr. Barry Norton 10 30.05.2010

11. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Why not just SWS? RDFS WeatherObservation XSPARQL Report CloudReport WindReport RDF [ rdf:value ??? # lifting rdf:type :WindReport #classification] Linked Open Services Dr. Barry Norton 11 30.05.2010

12. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Services as LOD RDF(S) WeatherObservation XSPARQL Report CloudReport WindReport RDF [ rdf:value :brokenClouds # lifting rdf:type :WindReport #classification] :brokenClouds rdf:value “broken clouds”@en; rdf:value “разбити облаци“@bg. Linked Open Services Dr. Barry Norton 12 30.05.2010

13. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, RDF(S) Services as LOD WeatherObservation XSPARQL Report CloudReport WindReport RDF [ rdf:value "30“^^xsd:int; # lifting <http://www.w3.org/2007/ont/unit/UnitName> ... # implicit knowledge rdf:type :WindReport #classification] :brokenClouds rdf:value “broken clouds”@en; rdf:value “разбити облаци“@bg. Linked Open Services Dr. Barry Norton 13 30.05.2010

14. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Services as LOD XSPARQL Where? RDF [ rdf:value "30“^^xsd:int; # lifting <http://www.w3.org/2007/ont/unit/UnitName> ... # implicit knowledge rdf:type :WindReport #classification] Linked Open Services Dr. Barry Norton 14 30.05.2010

15. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Services as LOD XSPARQL Where? Says who? RDF [ rdf:value "30“^^xsd:int; # lifting <http://www.w3.org/2007/ont/unit/UnitName> ... # implicit knowledge rdf:type :WindReport #classification] Linked Open Services Dr. Barry Norton 15 30.05.2010

16. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Services as LOD Implicit relationship of input and output XSPARQL Where? Says who? RDF [ rdf:value "30“^^xsd:int; # lifting <http://www.w3.org/2007/ont/unit/UnitName> ... # implicit knowledge rdf:type :WindReport #classification] Linked Open Services Dr. Barry Norton 16 30.05.2010

17. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Services as LOD Implicit relationship of input and output Implicit in interaction with particular service XSPARQL Where? Says who? RDF [ rdf:value "30“^^xsd:int; # lifting <http://www.w3.org/2007/ont/unit/UnitName> ... # implicit knowledge rdf:type :WindReport #classification] Linked Open Services Dr. Barry Norton 17 30.05.2010

18. JSON {"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, Services as LOD Implicit relationship of input and output Implicit in interaction with particular service XSPARQL Where? Says who? RDF [ rdf:value "30“^^xsd:int; # lifting <http://www.w3.org/2007/ont/unit/UnitName> ... # implicit knowledge rdf:type :WindReport #classification] Simply lifting I/O does not capture knowledge contribution of service execution Linked Open Services Dr. Barry Norton 18 30.05.2010

19. Linked Open Services (Principles/Manifesto) Describe and expose services as LOD prosumers Describe inputs and output as SPARQLgraph patterns Expose RESTfully with negotiable RDF Encode implicit knowledge in knowledge contribution Encode using SPARQL CONSTRUCTs Builds LOD-friendly processes: Conditions – SPARQL ASKs Iteration – SPARQL SELECTs Linked Open Services Dr. Barry Norton 19 30.05.2010

20. LOS! Example POST /examples/weatherICAO Host: www.linkedopenservices.org Content-Type: application/rdf+xml <rdf:RDF ...> <geonames:City about="http://www.geonames.org/.../Vienna"> ... </rdf:RDF> @prefix geonamesCities:<...> [geonamesCities:vienna :weatherCondition [:cloudReport :brokenClouds; :windReport [rdf:value "20“^^xsd:int ; unit:kph]] (+ reification for provenance) “разбити облаци“@bg. Linked Open Services Dr. Barry Norton 20 30.05.2010

21. Outlook Linked Open Services Tutorial @ ISWC LinkedOpenServices.org/examples Descriptions of real services LinkedOpenServices.org/ns Service and process models LinkedOpenServices.org/blog RSS feed of developments LinkedOpenServices.org/wiki Open development Linked Open Services Dr. Barry Norton 21 30.05.2010