Fwd: IRI creation and encoding

I added Peter Ansell's question on the comments page.

Before we send an official answer to that... In the current draft of Constructor Functions
http://www.w3.org/TR/sparql11-query/#FunctionMapping
I indeed miss casting to IRI. I think I'd agree that we need this direction of 
conversion to IRIs. 

In RIF there is a predicate http://www.w3.org/TR/rif-dtb/#pred:iri-string
for that.

Once we agree on that, the answer to the request should be clear (then the desired behaviour would be doable with a subquery)

best,
Axel 

Begin forwarded message:

> Resent-From: public-rdf-dawg-comments@w3.org
> From: "Peter Ansell" <ansell.peter@gmail.com>
> Date: 4 June 2010 08:01:16 GMT+03:00
> To: <public-rdf-dawg-comments@w3.org>
> Subject: IRI creation and encoding
> archived-at: <http://www.w3.org/mid/AANLkTilYqYnjuntFjsa_8ufqWVqzYWBeqPOO2d5NOgG2@mail.gmail.com>
> 
> Hi,
> 
> I am not sure what the progress has been on the (very useful)
> extension to make it possible for SPARQL to create new URI/IRIs from
> literals/variables [1] but it would be nice if the discussion could
> also include something about a function for string transformation to
> encode strings so that the URIs are valid.
> 
> For example it would be nice to be able to do something similar to the
> following pattern using a IRI/URI creation facility,
> 
> CONSTRUCT
> { ?s <skos:prefLabel> ?label . ?s <myLibrary:hasAlternateURI>
> IRI("http://otherlibrary.example/"+example:percentEncode(?label)+"/lang/"+example:percentEncode(lang(?label))}
> WHERE
> { ?s <skos:prefLabel> ?label . }
> 
> Cheers,
> 
> Peter
> 
> [1] http://www.w3.org/2009/sparql/wiki/Feature:IriBuiltIn
> 
>