Cool!
Ivan Mikhailov, 17-01-2011 13:41:
Hello Alex,
Right now Virtuoso supports "traditional" SQL collations for single-char
and wide varchars, but not for UTF-8. SPARQL does not offer any
collation handling ATM. I intend to make (better sooner than later)
three things:
1) implement a proxy BIF function that will make a call of specified
XPATH/XQuery function from SQL
2) implement a special support for this function in SPARQL-to-SQL
preprocessor so one can freely use XPATH functions in SPARQL.
3) let XQuery collation-based functions get RDF literals as arguments.
Best Regards,
Ivan Mikhailov
OpenLink Software
http://virtuoso.openlinksw.com
On Mon, 2011-01-17 at 10:53 +0000, Alex Rodriguez Lopez wrote:
Hi there!
I once inquired about ORDER BY (using portuguese characters too: UTF-8)
at the DBpedia mailing list, the same thing was happening to me when I
queried DBpedia's SPARQL end point (accented characters going directly
to the end), as I assume conparison is made based on byte order instead
of using collation tables or more ellaborate sorting algorithms. Me too,
I'm really interested in these features included in Virtuoso.
It would be really nice if Virtuoso would support different collations
for ordering (much like these ones
http://www.collation-charts.org/mysql60/ ), or just this one (
http://www.unicode.org/reports/tr10/ ) which I guess would do the trick
most times.
So +1 for UTF-8 sorting :D
Regards,
Alex
Renan Moreira de Oliveira, 14-01-2011 20:46:
Hello Ivan,
Have an estimated delivery of this function?
I'm needing this function for my current project.
Thanks.
Best Regards,
Renan Oliveira
-----------------------------------------------
Busca& Semântica - Globo.com
+55 21 2483-6727
Y! glb_renan
2011/1/14 Ivan Mikhailov<imikhai...@openlinksw.com
<mailto:imikhai...@openlinksw.com>>
Hello Renan,
I'm writing now some additional functions for removal of accents and
other Unicode NSMs (non-spacing modifiers) from strings, so there will
be possible to use ORDER BY (bif:some-function (?label))
OTOH, there will be no setting to make this behavior default.
Best Regards,
Ivan Mikhailov
OpenLink Software
http://virtuoso.openlinksw.com
> > Hi Aldo, Ivan Mikhailov and Virtuoso Users.
> >
> > Can you help me in using the ORDER BY?
> > He is by default case and accents sensitive?!
> > Is there any way to bypass this setting?
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