Dynamically generated graph inserts

[Joseph Shea]

I would like to use Sparql update commands like insert and delete in
SparqlMotion using the PerformUpdate Module, but have a variable name
for the graph. An example would be

INSERT INTO <http://www.testontology.com{?DBName}> {

?s ?p ?o .

}

WHERE {

?s a Owl:Thing.

?s ?p ?o .

}

[Holger Knublauch]

Hi Joe,

having variables there is not supported (yet?) by the SPARQL syntax, so we had to add a "hack" to allow this common requirement. The trick is that you need to pre-bind a variable (such as ?myGraph) to the URI resource of the named graph in a previous SM step. Then, you can "call" this named graph using the naming convention <urn:var:myGraph>.

I believe this mechanism should be working in 3.3.1 - if not then you will need to wait for 3.3.2 (soon).

Regards,
Holger

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[Joseph Shea]

Can you give me an example of this?

> >http://groups.google.com/group/topbraid-users?hl=en- Hide quoted text -
>
> - Show quoted text -

[Holger Knublauch]

Hi Joe,

here is an example script (attached).

In the (upcoming) SPARQLMotion XML syntax, this will look like

<sparqlmotion>

    <sml:BindBySelect sml:selectQuery="{#

        SELECT ?myGraph

        WHERE {

            LET (?myGraph := &lt;http://topbraid.org/examples/kennedys&gt;) .

        } }"/>

    <sml:PerformUpdate sml:updateQuery='{#

        INSERT INTO &lt;urn:var:myGraph&gt; {

            owl:Thing rdfs:comment "Test" .

        }

        WHERE {

        } }'/>

</sparqlmotion>

HTH

Holger