[Zope] catalog query

[Sébastien Georget]

Hi,

   I'm trying to query my portal_catalog for documents having 'kw1 AND kw2' 
in the Dublin Core Subject field.
It works well when I'm doing full-text queries, but it returns no document 
when I'm trying on Dublin Core fields.
Is it the expected behaviour ? is it possible to change it ?

It seems that portal_catalog has many parameters, is there one to change 
the default behaviour (match any keyword) to a match-all-keywords behaviour ?

thx

Sébastien Georget
http://purl.org/NET/Georget/Sebastien