- From: Axel Polleres <axel.polleres@deri.org>
- Date: Tue, 30 Mar 2010 16:24:03 +0100
- To: Ivan Mikhailov <imikhailov@openlinksw.com>, SPARQL Working Group <public-rdf-dawg@w3.org>
- Cc: Orri Erling <erling@xs4all.nl>
On 30 Mar 2010, at 15:26, Ivan Mikhailov wrote: > Hello Axel, > > > could you give me an example of a non-commutative aggregate? > > The example is any report generator, such as traditional XMLAGG > aggregate that makes an XML tree from its descendants. > > > Would we also allow aggregates with arityy different to 1 (like common in functions) e.g. agg-uri(?X ?Y) > > That's absolutely required for statistical calculations of all sorts, > from regression to likelihood detection. > > Best Regards, > > Ivan. > > BTW... also GROUP_CONCAT, right?
Received on Tuesday, 30 March 2010 15:24:39 UTC