Database Researchers Map

SFSW'09 Scripting Challenge Submission

http://researchersmap.informatik.hu-berlin.de

Olaf Hartig Hannes Mühleisen

Johann-Christoph Freytag

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Demo

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New Kind of Applications

● Users retain full control over their data

● Users manage and publish data on their own

● All that is needed for the application is a URI

…

<http://www.dbis.informatik.hu-berlin.de/ … /freytag.rdf#me> rdf:type :DBProfessor . …

http://researchersmap.informatik.hu-berlin.de/data/dbprofs

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Users Really Own their Data

…

<http://www.dbis.informatik.hu-berlin.de/ … /freytag.rdf#me> contact:fullName "Prof. Johann-Christoph Freytag, Ph.D." ; contact:office [ contact:address [ contact:street "Rudower Chaussee 25" ; contact:city "Berlin"^^xsd:string ; contact:postalCode "12489"^^xsd:string ] ] ; foaf:topic_interest <http://dbpedia.org/resource/Query_optimization> , <http://dbpedia.org/resource/Privacy> , <http://dbpedia.org/resource/Data_quality> , <http://dbpedia.org/resource/Data_warehouse> ; owl:sameAs <http://dblp.l3s.de/d2r/resource/authors/Johann_Christoph_Freytag> . …

http://www.dbis.informatik.hu-berlin.de/ ... /freytag.rdf

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Implementation

SQUINSemWeb

ClientLib

SELECT DISTINCT ?i ?labelWHERE {

?prof rdf:type <http://res ... data/dbprofs#DBProfessor> ; foaf:topic_interest ?i .

OPTIONAL { ?i rdfs:label ?label FILTER( LANG(?label)="en" || LANG(?label)="") }}ORDER BY ?label ?

● Realized with SQUIN● Query interface to the whole Web of Data● The whole Web as a single database

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Sample Query

SELECT DISTINCT ?i ?labelWHERE {

?prof rdf:type <http://res ... data/dbprofs#DBProfessor> . ?prof foaf:topic_interest ?i .

OPTIONAL {?i rdfs:label ?labelFILTER( LANG(?label)="en" || LANG(?label)="")

}}ORDER BY ?label

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Implementation (cont.)

● Realization of Researchers Map was very easy due to:● SQUIN / SemWeb Client Lib

● Approx. 700 LOC JavaScript (incl. 100 for the queries)

● Approx. 50 LOC PHP (Mainly to set up server side proxy due to same origin policy)

● Convenient access to SQUIN with SQUIN PHP tools

● SQUIN install package available: http://squin.org

$s = 'http:// …'; // address of the SQUIN service$q = new SparqlQuerySock( $s, '… SELECT ...' );$res = $q->getJsonResult(); // or getXmlResult()

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These slides have been created byOlaf Hartig

http://olafhartig.de

This work is licensed under aCreative Commons Attribution-Share Alike 3.0 License

(http://creativecommons.org/licenses/by-sa/3.0/)