- From: Steve Harris <steve.harris@garlik.com>
- Date: Fri, 20 Oct 2006 15:49:16 +0100
- To: andy.seaborne@hp.com
- Cc: RDF Data Access Working Group <public-rdf-dawg@w3.org>
On 20 Oct 2006, at 14:18, Seaborne, Andy wrote:
>
> No need for Chilean proposal 4 for additional restrictions - which
> I feel is
> too strong anyway (example below):
>
> SELECT *
> {
> ?x rdf:type skos:Concept .
> OPTIONAL { ?x skos:prefLabel ?label }
> OPTIONAL { ?x skos:altLabel ?label }
> }
>
For the record, I'm still very much against this kind of construct
(variables that appear only in OPTIONAL and appear in > 1 OPTIONAL).
I think it's not at all clear what it means (to humans) and adds an
unnecessary implementation burden.
I'm guessing that the example given above is just a hack to get round
the fact that we can't do SELECT COALESCE(?refLabel, ?altLabel)?
- Steve
Received on Friday, 20 October 2006 14:49:55 UTC