[Virtuoso-users] DISTINCT issue

[Sergio Fernández]

Hi,

in a experiment I've a dataset with many people (some of then
duplicated). I want just to list it, I'm doing something like:

SELECT DISTINCT(?name) ?person ?mail
WHERE {
  ?person rdf:type foaf:Person .
  ?person foaf:name ?name .
  ?person foaf:mbox_sha1sum ?mail
}

But DISTINCT doesn't work as I expected: if there are duplicated names,
it returns all. I know that DISTINCT() is not an standard syntax
according to [1]; I've read some example that use it over Virtuoso, but
I'm not sure about its behaviour.

Thank you in advance.

[1] http://www.w3.org/TR/rdf-sparql-query/#modDistinct

-- 
Sergio Fernández - sergio.fernan...@fundacionctic.org
R&D Deparment
CTIC Foundation - www.fundacionctic.org
Phone: +34 984 29 12 12
Fax:  +34 984 39 06 12
Edificio Centros Tecnológicos
Parque Científico Tecnológico
33203 Cabueñes - Gijón - Asturias - Spain