Hi Phil,
On Thu, 2006-06-22 at 13:51 +0100, Phil Powell wrote:
> Thanks Malcolm. I'm curious more than anything, since RDF etc gets
> talked about a lot, but implementations rarely seem to make it into
> the real-world.
For me, RDF is one of those things that I try to keep up to speed with,
because one day I will need it professionally. And it's fun to play
with. But I've never had to use it in anger so far.
>
> I referenced the exact same resource to pull together a basic
> triple-store library in Rails a while back, and it was fairly painless
> (although a tad hacky) - perhaps I'll sit down to try the same with
> Python and Django sometime. I certainly found the code I had working
> to be VERY powerful.
>
> Just out of curiosity, did you use a SPARQL-style syntax to build
> queries, then convert it into standard SQL? Or did you do what I did,
> and have an object-based API translate to SQL without a middle-man?
I guess mine was more of a combination. I wrote an interface that was
similar to the querying interface in Django at the time (0.90 / 0.91
style). Give it keyword args of what to select and triples describing
the filtering conditions. So I could write things like
get_object(values = ['?x', '?y'],
where = ['?x has ?y', '?y is red'])
That was then converted into real Django queries on the model using the
algorithm in the article we both found.
Looking at the code just now, it seems like I never had to implement the
equivalent of "from" because everything was essentially in one model.
One of the advantages of toy projects. :-)
Hmm.. this makes me want to play with this again. An API using the
current Django models and managers stuff could look very nice. In my
infinite spare time, perhaps...
Regards,
Malcolm
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/django-users
-~----------~----~----~----~------~----~------~--~---
