SPARQL/REST service to get all the Vocabularies available in an EVN instance

[sanjeev devireddy]

Hello,
       We want to display an HTML page with Metadata(Name, Graph URI/URN, etc... ) of all available Vocabularies in an EVN application. It is basically to list all the vocabularies available in an EVN instance. Is there any SPARQL/REST service available to achieve this?


Thanks,
sanjeev

[Irene Polikoff]

Sanjeev

Most of the services and their definitions are listed on the Available Web Services page. 

Even if the service you need is not there, it is a good resource for figuring out how to create a service you need. “Teamwork” services would be particularly useful for the kind of thing you want to accomplish.

For example, taking an inspiration from teamwork:UsagesOfSoftwareSystem (spin:SelectTemplate) or teamwork:GraphsOfGivenTypeUnderTeamworkControl (spin:SelectTemplate), your service could be defined as follows:

SELECT ?projectGraph ?name
WHERE {
    rdf:nil teamwork:graphsUnderTeamControl ( ?projectGraph ?teamGraph ) .
    BIND (teamwork:projectLabel(?projectGraph) AS ?name) .
}
ORDER BY (?name)

It would not need any input arguments.

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[sanjeev devireddy]

Thanks Irene, it works.

[sanjeev devireddy]

Irene, the SPARQL that you gave works fine and returns all Taxonomies, Ontologies & Reference Data sets.
We have another requirement to write a SPARQL for fetching Taxonomies only but not others(Ontologies, Reference Datasets,.. ). For that, inspired from a SPARQL(given below), which is to fetch a specific Vocabulary's name and it's type (rdf:type) based on Graph URI, I tried adding one new line(?projectGraph rdf:type ?type .) to the SPARQL that you gave above for getting Vocabularies type also. But that returns zero results. Could you please help us here?

SPARQL to get specific Vocabulary's name and it's type(rdf:type)

SELECT ?vocabName ?type
            WHERE {
            GRAPH <urn:x-evn-master:geo>{
                    <urn:x-evn-master:geo>rdfs:label ?vocabName .
                    <urn:x-evn-master:geo>rdf:type ?type .
            } .
            FILTER  (ui:label(?type)="http://evn.topbraidlive.org/evnprojects#Taxonomy")
}


RESULT




SPARQL to get all vocabularies(Taxonomies, Ontologies, etc..) Grpah , name and type

SELECT ?projectGraph ?name ?type

WHERE {
    rdf:nil teamwork:graphsUnderTeamControl ( ?projectGraph ?teamGraph ) .
    BIND (teamwork:projectLabel(?projectGraph) AS ?name) .

    ?projectGraph rdf:type ?type .
    }
ORDER BY (?name)




Thanks,
sanjeev

On Tuesday, April 11, 2017 at 11:33:41 PM UTC+5:30, Irene Polikoff wrote:

[Holger Knublauch]

This works for me, but the ui:label may return different things depending on from where you run the query. Safer would be to compare URIs:

            FILTER  (?type = <http://evn.topbraidlive.org/evnprojects#Taxonomy>)

or (better):

SELECT ?vocabName

WHERE {
    GRAPH <urn:x-evn-master:geo>{
        <urn:x-evn-master:geo>rdfs:label ?vocabName .

        <urn:x-evn-master:geo>rdf:type <http://evn.topbraidlive.org/evnprojects#Taxonomy>
    }
}

To walk through all (when executing on a server where you are logged in with suitable privileges):

SELECT ?projectGraph
WHERE {
    () <http://topbraid.org/teamwork#readableGraphsUnderTeamControl> (?projectGraph ?teamGraph) .
    GRAPH ?projectGraph {
        ?projectGraph a <http://evn.topbraidlive.org/evnprojects#Taxonomy> .
    }
}

Holger

[sanjeev devireddy]

Thanks Holger, it works.

Thanks,
Sanjeev