- From: Gregory Williams <greg@evilfunhouse.com>
- Date: Mon, 11 May 2009 12:36:56 -0400
- To: "Seaborne, Andy" <andy.seaborne@hp.com>
- Cc: SPARQL Working Group <public-rdf-dawg@w3.org>
A couple of questions... On May 11, 2009, at 10:36 AM, Seaborne, Andy wrote: > Choices for dealing with this include: > > 1/ The value space for MIN is the value space of the first > encountered datatype and everything incompatible is ignored. > > 2/ The value space has to be given - there is no single "MIN" > operation: > e.g. MIN(xsd:dateTime, ?x) In what way is this different from the explicit casting approach previously mentioned (MIN(xsd:date(?x))? Do you imagine that they would handle differently values for which the casting fails? > 3/ There is one answer per group for each datatype encountered in > the group. This means multiple rows per group. Could the same functionality be had by allowing a DATATYPE(?x) expression in the GROUP BY clause? thanks, .greg
Received on Monday, 11 May 2009 16:37:33 UTC