The document provides an overview of SPARQL, a query language designed for querying RDF and OWL data, emphasizing its ability to handle interlinked graphs rather than traditional tables. It discusses the differences between SPARQL and SQL, outlining various functions such as SELECT, DESCRIBE, CONSTRUCT, and ASK, along with example queries. Additionally, it includes links for further reading and resources related to SPARQL 1.0 and 1.1.

1. SPARQL SPARQL Protocol And RDF Query Language Robert Engels NFR Verdikt Project n o 2342453 Semantic Technology

2. from local to global Information management in the digital age From Locally isolated ... ... to Globally interconnected

3. But What CAN you get out of this?

4. What is SPARQL? Query Language for interlinked graphs represented using RDF/OWL annotations SPARQL 1.0: W3C recommendation 2008 SPARQL 1.1: nearly a recommendation

5. Why SPARQL? allows for querying RDF/OWL data & models allows to define globally unambiguous queries allows for distributed querying of datasets query results can be merged automatically

6. Differences with SQL? querying “graphs” instead of tables local keys are replaced with global identifiers tables need to provide the same schema, graphs do not

7. What can you do with SPARQL? various result types DESCRIBE, SELECT, ASK & CONSTRUCT create result sets using known operators a union of two sets (UNION) a set representing the reverse of a statement (NOT) … . algoritmic operators like count, avg , & sum specific to SPARQL 1.1

8. SPARQL - “DESCRIBE” Suppose The only thing you have is an Uri like this And no idea what is known about it.... http://data.esis.no/resource/projectID_111667 Simply send a SPARQL “DESCRIBE” to a sparql endpoint DESCRIBE <http://data.esis.no/resource/projectID_111667>

9. Result of SPARQL - “DESCRIBE” “ DESCRIBE” This node for me:

10. Result of SPARQL - “DESCRIBE” 1 1 1 1 1 2 2

11. SPARQL - “SElect” ... or you know what to look for and want to select specific resources. Send a sparql “select” to a sparql endpoint PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX dct: <http://purl.org/dc/terms/> PREFIX nfr: <http://data.esis.no/resource/> PREFIX foaf: <http://xmlns.com/foaf/0.1/> SELECT ?projectID ?projectName WHERE { ?projectID a foaf:Project ; dct:title ?projectName ; nfr:orgnrResponsibleOrg <https://ws.brreg.no/lod/enhet/962392687> . }

12. SPARQL - “SELECT”

13. RESULT SPARQL - “SELECT”

14. SPARQL - “CONSTRUCT” REPLACE NEW PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX dct: <http://purl.org/dc/terms/> PREFIX nfr: <http://data.esis.no/resource/> PREFIX foaf: <http://xmlns.com/foaf/0.1/> PREFIX funder: <http://research.data.gov.uk/def/project/> CONSTRUCT { ?projectID funder:title ?title } WHERE { ?projectID a foaf:Project; dct:title ?title ; nfr:orgnrResponsibleOrg <https://ws.brreg.no/lod/enhet/962392687> . }

15. SPARQL - “ASK” TRUE or FALSE? PREFIX nfr: <http://data.esis.no/resource/> ASK { ?projectID nfr:orgnrResponsibleOrg <https://ws.brreg.no/lod/enhet/962392687> }

16. Try it yourself! http://data.esis.no:2020/query.html http://opendata.computas.no:7001/joseki/

17. Further reading SPARQL 1.0 - W3C recommendation 2008 http://www.w3.org/TR/rdf-sparql-query/ SPARQL 1.1 – W3C SPARQL working group Wiki http://www.w3.org/2009/sparql/wiki/Main_Page Extensive tutorials by HP and Talis (and many others...) http://openjena.org/ARQ/Tutorial/index.html http://www.slideshare.net/ldodds/sparql-tutorial

18. www.sesam4.net