Re: [Rdfapi-php-interest] SPARQL FROM clause question

[Onno P. <onn...@gm...>]

Dear Richard,

The question is if RAP SPARQL can do it. I suppose the answer is no.
I think we should not talk about *any* RDF+SPARQL tool. PHP is highly
popular and every webhost offers it (albeit not PHP5). I think we should do
an effort to make RAP the best. I believe ontology browsers are the future;
they must be able to 'surf' triple stores.

Onno Paap


On 4/3/06, Richard Cyganiak <ri...@cy...> wrote:
>
> Hi Onno,
>
> On 3 Apr 2006, at 13:59, Onno Paap wrote:
> > I would like to combine different ontology's resident in triple
> > stores on different servers. Eventually, thousands of them.
> > I am not certain but I suppose the SPARQL syntax provides for that.
> Well ... SPARQL has syntax for querying multiple *graphs*. A graph
> can be anything with a URI.
>
> The question is, what kind of URIs can you use in the FROM clause?
> That depends totally on the triple store/toolkit you're using.
>
> In most SPARQL stores, you can put URIs of RDF files in the FROM
> clause. This means you can query multiple RDF *files* that reside on
> different servers.
>
> What you want to do is query multiple *endpoints*. I don't know of
> *any* tool that can do this yet, but it would certainly be very
> useful and cool. So if you build it, be sure to tell us about it!
>
> Richard
>
>