Hi,
I would think that it is store and implementation dependent.
Does a specified UTF-8 character order exist?
Did you try it on other stores or Jena?
(I just realize that I'm not answering your question, but adding more
questions on top ;)
There is a paper at ISWC, that might be interesting also:
Sören Auer, Matthias Weidl, Jens Lehmann, Amrapali J. Zaveri, Key-Sun
Choi: I18n of Semantic Web Applications.
<http://www.informatik.uni-leipzig.de/%7Eauer/publication/I18n.pdf>
http://www.informatik.uni-leipzig.de/~auer/publication/I18n.pdf
Regards,
Sebastian
Am 26.08.2010 16:08, schrieb Alex Rodriguez Lopez:
Hi!
I'm new to the list and to the whole Linked Data thing altoghether, but
will have to work on it for some time so I'll be exploring the DBpedia
SPARQL end-point for a project we are working on.
The thing is, it is based on Portuguese resources, and I was wondering
first of all what is the general feeling on working with DBpedia on
other-than-english resources.
For example, (and this is my concrete question), is there a way to
correctly order results so accented characters are also correctly ordered?
If I try this example query on http://dbpedia.org/sparql :
SELECT ?label
WHERE {
[] skos:subject<http://dbpedia.org/resource/Category:Portuguese_writers> ;
rdfs:label ?label .
FILTER ( langMatches(lang(?label), "PT") )
}
ORDER BY ?label
I get this results
http://dbpedia.org/sparql?default-graph-uri=http://dbpedia.org&should-sponge=&query=SELECT+%3Flabel%0D%0AWHERE+{%0D%0A[]+skos:subject+%3Chttp://dbpedia.org/resource/Category:Portuguese_writers%3E+;%0D%0A+++rdfs:label+%3Flabel+.%0D%0A%0D%0AFILTER+(+langMatches(lang(%3Flabel),+%22PT%22)+)%0D%0A}%0D%0AORDER+BY+%3Flabel&format=text/html&debug=on&timeout=
Notice that at the end
...
Urbano Tavares Rodrigues
Vasco Graça Moura
Vitorino Nemésio
Álvaro Cunhal
"Álvaro" gets incorrectly ordered at the end.
Is this dependent on the underlying store (much like SQL collations)? Is
there something that can be done on my side to get this query ordered
like it should be for Portuguese / UTF8 (some notation in SPARQL or
specific to DBpedia / Virtuoso )?
Thanks and keep up the good work!! This is a truly impresive project!
Regards,
Alex
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Homepage: http://bis.informatik.uni-leipzig.de/SebastianHellmann
Research Group: http://aksw.org
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