Hi Guil,
I guess even creating rdf:Lists that are needed for OWL intersections are
difficult to represent in SPARQL CONSTRUCT alone. Sounds more like a job for
SPARQLMotion or some custom modules in Java. I don't see a simple solution here.
Holger
On Mar 4, 2011, at 12:59 PM, Guilherme Scomparim wrote:
> Hi Scott,
>
> Sorry to confuse things. To make easier, forget about the
> aggregation issue for now.
>
> Based on the triples that I sent before, I am already able to create
> the construct below and it creates all the restrictions correctly.
>
> CONSTRUCT {
> ?thing a owl:Class .
> ?thing rdfs:subClassOf owl:Thing .
> ?thing owl:equivalentClass _:b0 .
> _:b0 owl:onProperty ?OP .
> _:b0 owl:minCardinality ?Number .
> }
> WHERE {
> ?thing a pmda:State .
> ?thing pmda:hasRestriction ?Restr .
> ?Restr pmda:restrictionOpenBracket ?OB .
> ?Restr pmda:restrictionCloseBracket ?CB .
> ?Restr pmda:restrictionNumber ?Number .
> ?Restr pmda:restrictionOnProperty ?OP .
> ?Restr pmda:restrictionSequence ?Seq .
> ?Restr pmda:restrictionType ?Typ .
> }
>
> My problem is that this construct cannot create the intersections and
> unions required for some of these restrictions.
>
> In order to do that I need to understand how to use “For each” in
> SPARQL to manipulate more than one record in the same construct like
> pmda:restrictionOpenBracket[1] and pmda:restrictionCloseBracket[2]
>
> Any help in understanding better how to use For Each in SPARQL is
> what I really need now.
>
> Thanks again,
> Guil
>
>
> On Mar 4, 12:59 pm, Scott Henninger <[email protected]>
> wrote:
>> Hello Guil; I'm having a bit of trouble with the question. The
>> initial paragraph talks about aggregates, but the rest seems to be a
>> non-standard representation of OWL restrictions.
>>
>> In terms of "for each", the key is to understand how SPARQL works.
>> Given a graph pattern in the WHERE clause, a SPARQL engine will
>> produce a result for each match of the graph pattern. In particular,
>> this means the "for each" is built into the SPARQL standard to start
>> with.
>>
>> With that understanding, you may end up reformulating your approach,
>> so be sure to post any follow-on questions you may have. BTW, the OWL
>> standard specifies a way of representing OWL restrictions. So that's
>> also already available - see Help > How to? > Create a local
>> restriction, and look at the source code sub-tab. Choose the Turtle
>> text serialization and you will see how OWL restrictions are
>> represented in RDF.
>>
>> -- Scott
>>
>> On Mar 3, 6:07 pm, Guilherme Scomparim <[email protected]> wrote:
>>
>>
>>
>>> Hi all,
>>
>>> I was wondering if there is a way to manipulate “recordsets” when
>>> building a spin:construct
>>
>>> I am not sure if I am doing this in the proper way. Since I have not
>>> found “For each” functionality in SPIN, I am trying to create
>>> different queries using different filters that require count() and
>>> group by to create different constructs based on the data in the
>>> “recordsets” and this is not possible following the message “Aggregate
>>> expression not legal at this point”
>>
>>> To help understand my problem, I have a class called State that
>>> relates to another class called StateRestriction via a particular
>>> property. This relationship defines the restriction criterion for each
>>> State as defined below.
>>
>>> pmda:State a owl:Class .
>>> pmda:StateRestriction a owl:Class .
>>> pmda:hasRestriction rdfs:domain pmda:State .
>>> pmda:hasRestriction rdfs:range pmda:StateRestriction .
>>> pmda:restrictionSequence rdfs:domain pmda:StateRestriction .
>>> pmda:restrictionOpenBracket rdfs:domain pmda:StateRestriction .
>>> pmda:restrictionOnProperty rdfs:domain pmda:StateRestriction .
>>> pmda:restrictionType rdfs:domain pmda:StateRestriction .
>>> pmda:restrictionValue rdfs:domain pmda:StateRestriction .
>>> pmda:restrictionCloseBracket rdfs:domain pmda:StateRestriction .
>>> pmda:restrictionConjunctionDisjuntion rdfs:domain
>>> pmda:StateRestriction .
>>
>>> I already create a construct that creates a restriction class for each
>>> instance of the pmda:State.
>>
>>> Now I need to create the Intersections and Unions of the restrictions
>>> that are defined as many instances of the pmda:StateRestriction for
>>> each pmda:State.
>>
>>> This requires me to deal with a list of State Restrictions that are
>>> related to a unique State and I am really not sure how to do that.
>>
>>> Thanks in Advance,
>>> Guil- Hide quoted text -
>>
>> - Show quoted text -
>
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