Sparqlmotion working with EDG context

Colin Meerveld

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Apr 23, 2020, 3:46:14 AM4/23/20

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Hi,

I created a sparqlmotion service to convert RDF to XML. For asserted triples which are deployed to EDG this seems to work fine. However, newly created instances within EDG doesn't work. I currently use the import module (see screenshot) and believe this must be changed to an EDG context (e.g. an EDG exposed graph) but don't know how to practically do this. Some assistance would be appreciated.

Thanks,

Colin Meerveld

Richard Cyganiak

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Apr 23, 2020, 4:22:50 AM4/23/20

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Hi Colin,

I think what you need to do is:

1) Get the graph URI of the asset collection containing the EDG instances. This can be found on the Settings tab of the asset collection and is a URI of the form urn:x-evn-master:...

2) In the SPARQLMotion script, use the Import RDF From Workspace module, with that graph URI as the sml:baseURI, and sml:ignoreImports set to true or false depending on whether you want to include triples from other included asset collections and system graphs

3) Any further SPARQLMotion modules in the chain now have access to the triples from the EDG asset collection.

Hope that helps,

Richard

On 23 Apr 2020, at 07:33, Colin Meerveld <colin.m...@gmail.com> wrote:

Hi,

I created a sparqlmotion service to convert RDF to XML. For asserted triples which are deployed to EDG this seems to work fine. However, newly created instances within EDG doesn't work. I currently use the import module (see screenshot) and believe this must be changed to an EDG context (e.g. an EDG exposed graph) but don't know how to practically do this. Some assistance would be appreciated.

<sparqlmotion.jpg>

Thanks,

Colin Meerveld

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<sparqlmotion.jpg>

Colin Meerveld

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Apr 24, 2020, 2:41:30 AM4/24/20

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Hi Richard,

Great, this works, thank you so much! I never knew that a workspace was referring to an EDG asset collection as i always thought this was a composer/eclipse workspace.

Colin

On Thursday, April 23, 2020 at 10:22:50 AM UTC+2, Richard Cyganiak wrote:

Hi Colin,

I think what you need to do is:

1) Get the graph URI of the asset collection containing the EDG instances. This can be found on the Settings tab of the asset collection and is a URI of the form urn:x-evn-master:...

2) In the SPARQLMotion script, use the Import RDF From Workspace module, with that graph URI as the sml:baseURI, and sml:ignoreImports set to true or false depending on whether you want to include triples from other included asset collections and system graphs

3) Any further SPARQLMotion modules in the chain now have access to the triples from the EDG asset collection.

Hope that helps,
Richard

On 23 Apr 2020, at 07:33, Colin Meerveld <colin....@gmail.com> wrote:

Hi,

I created a sparqlmotion service to convert RDF to XML. For asserted triples which are deployed to EDG this seems to work fine. However, newly created instances within EDG doesn't work. I currently use the import module (see screenshot) and believe this must be changed to an EDG context (e.g. an EDG exposed graph) but don't know how to practically do this. Some assistance would be appreciated.

<sparqlmotion.jpg>

Thanks,

Colin Meerveld

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Richard Cyganiak

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Apr 24, 2020, 8:14:39 AM4/24/20

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Yes, EDG has the same kind of workspace as TBC underneath, although in EDG it is usually somewhat hidden behind a higher-level abstraction (an RDF/SPARQL-style “set of named graphs”, which in turn is somewhat hidden behind the “asset collection” abstraction).

The name of the “Import RDF From Workspace” module might be a bit unhelpful when using it with the sml:baseURI argument. Think of it as “Load triples from a system-managed graph into a SPARQLMotion script”.

Richard

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Colin Meerveld

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Jun 4, 2020, 9:09:31 AM6/4/20

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Hi Richard,

Still a bit confused. Currently i want to do the opposite. i.e. add data to EDG similar to the following SPARQL query:

INSERT {
	GRAPH ?graph {
    	?s rdfs:comment ?annotation .
	}
}
WHERE {
	BIND("archimate_example_model" AS ?workspace).
	BIND("aangifte" AS ?station).
 	BIND("test3" AS ?annotation).
    BIND (URI(CONCAT("urn:x-evn-master:", ?workspace)) AS ?graph) .
    GRAPH ?graph {
        ?s rdfs:label ?station .
    } .
}

This query works in Composer. I translated this into a sparqlmotion script where the first three binds are arguments and uses an apply construct node to construct the new nodes. Lastly i use the Export-to-RDF-file node to save the constructed triples back in the asset collection. However the last step doesn't work. Any thoughts?

Thanks,

Colin

p.s. the source: https://github.com/btotr/metromap/blob/development/put-annotation.sms.ttl

On Friday, April 24, 2020 at 2:14:39 PM UTC+2, Richard Cyganiak wrote:

Yes, EDG has the same kind of workspace as TBC underneath, although in EDG it is usually somewhat hidden behind a higher-level abstraction (an RDF/SPARQL-style “set of named graphs”, which in turn is somewhat hidden behind the “asset collection” abstraction).

The name of the “Import RDF From Workspace” module might be a bit unhelpful when using it with the sml:baseURI argument. Think of it as “Load triples from a system-managed graph into a SPARQLMotion script”.

Richard

To view this discussion on the web visit https://groups.google.com/d/msgid/topbraid-users/5aec5131-0925-4045-bd90-d0755ac58bad%40googlegroups.com.

Richard Cyganiak

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Jun 4, 2020, 2:16:06 PM6/4/20

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Hi Colin,

Export to RDF file actually does what it says on the tin—it exports the results to an RDF file in the workspace. It doesn't work for updating a graph in the system database.

The closest equivalent to Import RDF from Workspace in the other direction is Perform Update, but that is not entirely safe to use for EDG graphs such as the urn:x-evn-master:xxx ones.

Personally I would use SWP over SPARQLMotion for this kind of task. It's much closer to a traditional programming/scripting language (but with a very strange syntax, and an RDF/SPARQL-based type system).

Richard

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Colin Meerveld

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Jun 5, 2020, 4:56:38 AM6/5/20

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Thanks again Richard!

I played around with the Perform update node for a while but somehow it doesn't update the EDG graph. This is, i suppose, why you need SWP. I use SWP only for UI to keep it separated from the (web)services which makes it more readable.

Another option, i guess, is to use a graphgl endpoint but the project already uses a couple of sparqlmotions scripts and i don't like to mix those different abstraction into one project. Currently i use a sparqlmotion service and return a swp document so-that i could set the context. This feels like a hack but does the job.

Here is the final solution:

<ui:group let:graphURI="{= IRI(CONCAT(&quot;urn:x-evn-master:&quot;, LCASE(?workspace))) }">
    <ui:setContext ui:queryGraph="{= ui:graphWithImports(?graphURI) }">
        <ui:update ui:updateQuery="{!
                INSERT {
                    GRAPH ?graphURI {

?s rdfs:comment ?annotation .

                    } .
                }
                WHERE {
                    GRAPH ?graphURI {

                        ?s rdfs:label ?station .
                    } .

                } }"/>
    </ui:setContext>
	done!
</ui:group>

Cheers,

Colin

On Thursday, June 4, 2020 at 8:16:06 PM UTC+2, Richard Cyganiak wrote:

Hi Colin,

Export to RDF file actually does what it says on the tin—it exports the results to an RDF file in the workspace. It doesn't work for updating a graph in the system database.

The closest equivalent to Import RDF from Workspace in the other direction is Perform Update, but that is not entirely safe to use for EDG graphs such as the urn:x-evn-master:xxx ones.

Personally I would use SWP over SPARQLMotion for this kind of task. It's much closer to a traditional programming/scripting language (but with a very strange syntax, and an RDF/SPARQL-based type system).

Richard

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