[Rdfapi-php-interest] Re: SPARQL in RAP

[Benjamin N. <bn...@ap...>]

On 28.04.2005 10:44:08, Chris Bizer wrote:
>
>Hi Benjamin,
>
>Hannes pointed me at your SPARQL implementation yesterday. 
>We are currently looking for a way to get SPARQL into RAP and are =
wondering
>if we could use your parser.
yes, sure. although I'd probably suggest waiting for the next release.
the current one has not been tested in any way other than with some
hand-written test queries. I have already extracted a list of queries
from the sparql WD but haven't found the time yet to test them with
the parser. the embedded turtle parser needs some more work, too.
Although including my stuff into RAP and getting some bug reports
could be helpful to me as well.

>Do you mind if we include your code into RAP? Would be great!
I'd be honoured :)
Another interesting thing could be to try porting my SPARQL-to-SQL
rewriter to the RAP db model. I received some helping comments and
bug reports from Richard Cyganiak, so more work is needed there, too,
but a next version of the rewriter could perhaps be usable already.

>What are your future plans for your code? Do you plan to support all =
SPARQL
>features or only a subset? What is the timeline of your work?  
ouch, timeline questions ;)
The parser currently doesn't parse constraints. That'd be the next
thing to do, especially as I want to use at least PrimaryExpressions
in the rewriter (such as FILTER ?date > 2005-03). I'm aiming at being
able to *parse* all of the SPARQL grammar features, but I'm actually
not sure if I want to try to add support for custom filters in the
rewriter. I'll probably focus on a subset that can be translated to
SQL.
Re timeline: Apart from obvious bug-fixes I'll probably not be
able to continue working on the parser before delivering an initial
version of the overdue semanticweb.org site. It may be that I have
to improve the parser *for* the portal (e.g. to add support for simple
constraints), but otherwise, I fear it won't happen before mid-may..


>I'm looking forward to (hopefully) meeting you in Crete. 
yeah, that would be great. I'm not sure if I can afford the eswc
this year, but I'm still hoping to at least get there for the
scripting workshop...

cheers,
benjamin

--
Benjamin Nowack

Kruppstr. 100
45145 Essen, Germany
http://www.bnode.org/

>
>Chris
>
>
>-- 
>Chris Bizer
>Freie Universit=E4t Berlin
>Phone: +49 30 838 54057
>Mail: ch...@bi...
>Web: www.bizer.de
>