CODEWITHSUNDEEP
sparqlowlsemantic-web
Murat Kılınç
Murat Kılınç

Reputation: 175

Condition error in SPARQL query from OWL file

in a sparql query, I want to list people who are older than 35 years. but I get the following error. what would be the reason?

(The result doesn't change even if I do ?yas > 35. I still get the error.)

QUERY:

PREFIX uni:<http://muratkilinc.com/~ontologies/izmir.owl#>
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX un: <http://www.w3.org/2007/ont/unit#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT ?adi ?soyadi ?yas
WHERE
{
    ?turistler uni:yas ?yas > "35" .
    ?turistler uni:yas ?yas.
    ?turistler uni:adi ?adi.
    ?turistler uni:soyadi ?soyadi.      
}

ERROR:

Error 400: Parse error: 
Encountered " ">" "> "" at line 9, column 33.
Was expecting one of:
    "values" ...
    "graph" ...
    "optional" ...
    "minus" ...
    "bind" ...
    "service" ...
    "let" ...
    "exists" ...
    "not" ...
    "filter" ...
    "{" ...
    "}" ...
    ";" ...
    "," ...
    "." ...

Upvotes: 0

Views: 57

Answers (1)

Jeen Broekstra
Jeen Broekstra

Reputation: 22042

To put these kinds of boolean conditions in a SPARQL query, you have to use a FILTER constraint. Like so:

PREFIX uni:<http://muratkilinc.com/~ontologies/izmir.owl#>
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX un: <http://www.w3.org/2007/ont/unit#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT ?adi ?soyadi ?yas
WHERE
{
    ?turistler uni:yas .
    ?turistler uni:yas ?yas.
    ?turistler uni:adi ?adi.
    ?turistler uni:soyadi ?soyadi.
    FILTER(?yas > 35)      
}

The SPARQL W3C doc is a great resource to read up on what kinds of filter expression you can use, and how to work with different value datatypes (strings, ints, dates, etc.).

Upvotes: 1

Related Questions