Re: SPIN-API and Jena in my own application?

[Gunnar Aastrand Grimnes]

Thanks Holger, Andy!

When I made a standalone test-case, it suddenly worked.
It turns out the problem was querying the DataSet (with each qudt part, 
spin, etc. in different named graphs) - if I change to querying the 
UninonModel it works fine.

Thanks!

- Gunnar

On 07/03/12 01:21, Holger Knublauch wrote:
Hi Gunnar,

[for SPIN API questions it might be best to move them to the TopBraid mailing 
list, and yes there is some traffic of people using it in their own 
applications. On that list, ideally prefix your question with [SPIN API] so 
that we can categorize it more easily].

        https://groups.google.com/d/forum/topbraid-users

If your specific query did not work, please make sure that the new functions 
and magic properties are registered, using
                
     SPINModuleRegistry.get().registerAll(model, null)

You should see a warning somewhere if the function (e.g. qudspin:convertLiteral) isn't 
found. If I am on the wrong track, please post a "complete" example source code 
to our list and I can take a look there.

HTH,
Holger


On Mar 7, 2012, at 1:12 AM, Gunnar Aastrand Grimnes wrote:

Hi Jena users (and hopefully some TopQuadrant people),

I've been trying to use the open-source parts of SPIN-API in my own 
application, i.e. outside of topbraid composer.

The plan is to use the qudspin library for on-the-fly conversion of qudt units.

Now documentation is a bit sparse, but so far I've done:

Load a model with all of:
* SPIN Documents from http://spinrdf.org/spin,spl,sp
* QUDT defn, i.e. all of qudt-units, qudt-dtype, etc.
* The qudspin library - the version from http://topbraid.org/spin/qudspin uses 
the old namespace for qudt, I've changed this.

add a triple:

Model m = getNamedModel("urn:mygraph");
                                
Resource r = m.createResource("urn:resource");
Property p = m.createProperty("urn:p");
m.add(r, p, m.createTypedLiteral(2, "http://qudt.org/vocab/unit#Meter";));
                                
m=getUnionModel();

                                SPINModuleRegistry.get().registerAll(m,null);

Then I pose the query:

                                
PREFIX qudspin:<http://topbraid.org/spin/qudspin#>
PREFIX unit:<http://qudt.org/vocab/unit#>
SELECT * WHERE {
   <urn:resource>  <urn:p>  ?v .
   BIND ( qudspin:convertLiteral(?v, unit:Furlong ) as ?length )
}


But this doesn't work :( - ?length never gets any value.

There is a chance there is still some namespace issues - I just wanted to check 
if there is something SPIN related I've misunderstood?

Anyone here had SPIN working outside TB Composer?

Cheers!

- Gunnar