Re: ProjectExpressions without concat

On 15 Jun 2009, at 23:27, Axel Polleres wrote:

> Kjetil was concerned since fn:concat wasn't supported yet in  
> standard SPARQL. An alternative would be to resort to something  
> else, like e.g. STR():
>
> e.g.
>
>   CONSTRUCT { ?x ex:mailstring STR(?mbox) . }
>   WHERE { ?x foaf:mbox ?mbox }

My feeling is that combining Projection and construct expressions is a  
bad idea, these are distinct features.

> or (using subqueries)
>
>   CONSTRUCT { ?x ex:mailstring ?m . }
>   WHERE {
>     { SELECT ?x, STR(?mbox) AS ?m
>       ?x foaf:mbox ?mbox
>     }
>
> but I am quite unsure... is there anyone supporting this?

Anyone who supports subselects will support the latter, by default.

- Steve

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Steve Harris
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