[Rdfapi-php-interest] SPARQL in RAP

[Chris B. <bi...@ze...>]

Hi Benjamin,

>>Hannes pointed me at your SPARQL implementation yesterday.=20
>>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.

Great, thanks a lot.

Next release also sounds good, because we first want to get Named Graphs
into RAP and build SPARQL on top afterwards.

>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.=20

Did you see the DAWG tests?
http://www.w3.org/2001/sw/DataAccess/tests/

>the embedded turtle parser needs some more work, too.

Is the parser an adoption of existing N3 code or a new implementation?
Can it also be used separately from SPARQL?

>Although including my stuff into RAP and getting some bug reports
>could be helpful to me as well.

I can guarantee lots of bug reports from the RAP users. Even more than =
you
probably want ;-)

>>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.
>

Yes, this would be interesting. I'm also having the loose plan to look =
for a
student who might port D2RQ to PHP
(http://www.wiwiss.fu-berlin.de/suhl/bizer/d2rq/index.htm). This would =
be
great because then you could query all relational databases of CMS, =
blogs,
wikis or whatever using SPARQL. But this is more a mid-term plan ...

>>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? =20
>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..
>

Fits perfectly with our timeline. I guess we won't start with SPARQL QL
before June. See:
http://sourceforge.net/mailarchive/message.php?msg_id=3D11593860

>
>>I'm looking forward to (hopefully) meeting you in Crete.=20
>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...
>

Which would of course be even more important than the conference ;-)

Cheers,

Chris

>cheers,
>benjamin

--
Benjamin Nowack

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

>
>Chris
>
>
>--=20
>Chris Bizer
>Freie Universit=E4t Berlin
>Phone: +49 30 838 54057
>Mail: ch...@bi...
>Web: www.bizer.de
>