How to use NOT EXISTS & Regex in my SPARQL Queries

880207 Aug 9, 2011 12:43 PM

Hi,

I want to use NOT EXISTS & Regex in my SPARQL Queries to check the existence and to check presence associate name.

I am using Jena 2.6.3 & Jena Adapter for Oracle Release 2.
I get error's while running the program example found "(" or say found "exists"

Can you share some example's which i can refer and trying implementing.

Thanks,
Manish H

1. Re: How to use NOT EXISTS & Regex in my SPARQL Queries

alwu-Oracle Aug 9, 2011 4:15 PM (in response to 880207)

Hi,

Is bound what you are looking for?

An example from http://www.w3.org/TR/rdf-sparql-query/

PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
SELECT ?name
WHERE { ?x foaf:givenName ?givenName .
OPTIONAL { ?x dc:date ?date } .
FILTER ( bound(?date) ) }

To get a negation, you can use FILTER (!bound(...))

An example of regex is as follows.

SELECT ?sp ?c
WHERE
{ ?sp rdfs:subPropertyOf ?c FILTER regex(?c,"work","i") }

Thanks,

Zhe Wu
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2. Re: How to use NOT EXISTS & Regex in my SPARQL Queries

880207 Aug 11, 2011 4:47 PM (in response to alwu-Oracle)

Hi Zhe,

Thanks it worked fine for my requirement.

Regards,
Manish Hardasmalani
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