[sparql related] how to get the language of a label

[jbrekle]

hi,

i know its not directly ontowiki related, but maybe you can help me at
that:

i can get the labels of all classes:

SELECT ?class ?label WHERE {
?class rdf:type rdfs:Class .
?class rdfs:label ?label
}

but as there are are english and german labels - i get both.

to get only the german labels, i tried:

PREFIX xml: <http://www.w3.org/XML/1998/namespace>
SELECT ?class ?label WHERE {
?class rdf:type rdfs:Class .
?class rdfs:label ?label .
?label xml:lang de}

but it results in an error:
SPARQL Error: [unixODBC][OpenLink][Virtuoso iODBC Driver][Virtuoso
Server]SQ074: Line 17: SP030: SPARQL compiler, line 16: syntax error
at 'de' before '}' (37000)
Query: PREFIX sioc: PREFIX skos: PREFIX vcard: PREFIX foaf: PREFIX dc:
PREFIX owl: PREFIX rdfs: PREFIX rdf: PREFIX xml: SELECT ?class ?label
FROM FROM WHERE { ?class rdf:type rdfs:Class . ?class rdfs:label ?
label . ?label xml:lang de}

i also tried with "de" (in quotes). but this gives me "no result"

any idea?

[jbrekle]

alright, the above query is not the sparql-way :)
and i was suggested that i need to do it somehow with a filter...

it thought of:

PREFIX xml: <http://www.w3.org/XML/1998/namespace>
SELECT ?class ?label WHERE {
?class rdf:type rdfs:Class .
?class rdfs:label ?label .

?label xml:lang ?lang .
FILTER (?lang = "de")
}

but it looks like i am wrong there too because the label is not a
triple or am i mistaken there? because when i do

SELECT ?p

WHERE {
?class rdf:type rdfs:Class .
?class rdfs:label ?label .

?label ?p ?o
}

i get no results...

thanks
jonas

[jbrekle]

i got it :)

PREFIX xml: <http://www.w3.org/XML/1998/namespace>
SELECT ?class ?label WHERE {
?class rdf:type rdfs:Class .
?class rdfs:label ?label

FILTER (LANG(?label) = "de")
}

thanks

[Sebastian Dietzold]

quote jbrekle (29.4.2009):

> to get only the german labels, i tried:

> PREFIX xml: <http://www.w3.org/XML/1998/namespace>
> SELECT ?class ?label WHERE {
> ?class rdf:type rdfs:Class .
> ?class rdfs:label ?label .
> ?label xml:lang de}

please use

FILTER (lang(?label) = "de" )

regards

SD

--
Sebastian Dietzold - Department of Computer Science; University of Leipzig
Tel/Fax: +49 341 97 323-66/-29 http://bis.uni-leipzig.de/SebastianDietzold