- From: Lee Feigenbaum <lee@thefigtrees.net>
- Date: Mon, 15 Mar 2010 22:03:45 -0400
- To: Marcelo Arenas <marcelo.arenas1@gmail.com>
- CC: Juan Sequeda <juanfederico@gmail.com>, public-rdb2rdf-wg@w3.org
On 3/15/2010 11:55 AM, Marcelo Arenas wrote:
>> + the ability to project expressions from queries rather than variables only
>
> I don't understand this functionality. Maybe Lee could gives us an
> example of such a query.
In SPARQL 1.0, the only thing that can be projected from a query are
variables:
SELECT ?var1 ?var2 ?var3
WHERE {
... ?var1 ... ?var2 ... ?var3 ...
}
In SPARQL 1.1, any expression can be projected into a result set:
SELECT ?var1 (?var2 + 2 AS ?sum) (fn:myCrazyFunction(?var3) AS ?crazy)
WHERE {
... ?var1 ... ?var2 ... ?var3 ...
}
Lee
Received on Tuesday, 16 March 2010 02:04:22 UTC