[Nepomuk] Resource clouds

[Ignacio Serantes]

Hi,

Sebastian explain this a couple of days ago here :). Count is available in
API using CreateCountQuery

http://api.kde.org/4.x-api/kdelibs-apidocs/nepomuk/html/classNepomuk_1_1Query_1_1Query.html#ad3c79b80b619cab4841e8faa203fb3daad550c1ac98e41005749758fab9aded3f

So basically you must construct the query using the API and then add the
CreateCountQuery flag.

On Tue, Oct 18, 2011 at 2:36 PM, Marco Martin <notmart at gmail.com> wrote:

> Hi all,
>
> a thing i'm experimenting with for the resource browser of active is being
> able to have informations from nepomuk as "clouds" of attributes, so apart
> the
> tag cloud (easy, built in ;) i need a similar thing for other properties as
> well, so results of the form property/occurrences
>
> i did some experiments and did manage only in pure Sparql so far (see
> below)..
>
> would those be possible in the c++ api? also because i would like to
> arbitrarly mix them to have things like
> "cardinalities of ratings per activity"
> or
> "cardinalities of tags of things in a certain date interval"
> and in Sparql can become very messy quite quickly ;)
>
>
> #how many resources of each type
>
> SELECT ?o count(*) as ?count
> WHERE {?s rdf:type ?o}
> group by ?o
>
>
>
>
> #how many resources of each rating
>
> SELECT ?rating count(*) as ?count
> WHERE {?s
> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#numericRating>
> ?rating}
> group by ?rating
>
>
>
>
> #how many resources of each type, related to the activity
> nepomuk:/res/47d7281f-dd5c-4162-8026-5bc069f91945
>
> select distinct ?t count(*) as ?count
> where { <nepomuk:/res/47d7281f-dd5c-4162-8026-5bc069f91945>
> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#isRelated> ?r .
> ?r rdf:type ?t .
> ?r <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#userVisible>
> ?v1
> .
> FILTER(?v1>0) . }
> group by ?t
>
>
>
> #how many resources per activity
>
> select distinct ?a count(*) as ?count
> where { ?a
> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#isRelated> ?r
> . ?a rdf:type kext:Activity
> } group by ?a
>
> --
> Marco Martin
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>



-- 
Best wishes,
Ignacio
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