Bruce; Some responses inline:
On Feb 17, 5:42 pm, Bruce Whealton <[email protected]> wrote:
> What is meant by ?|1? Is that some way of expressing a variable?
> I've never seen a variable follow a? With a pipe character followed
> by a number.
Character in some fonts are difficult to interpret. The pipe
character above is actually a lowercase "L".
> I wonder if I can use something like transitive closure on a genealogy
> application. The ralationship vocabulary defines rel:descendantOf, so
> I can define that between a person and each of their parents. If the
> bio vocabulary defines this as transitive then the ancestorOf each of
> my parents is the bio:ancestorOf me and so on. However, we need a
> reasoner to accomplish this, right? And while intuitively we would
> expect this property to be transitive, I don't see anything in the
> specification that declares this property to be transitive.
In terms of transitive relationships you can use a reasoner to compute
the transitive closure. Note, though, that this will compute *all*
transitive relationships in your model. If you want to compute this
on a limited set of resources, such as "my ancestors", I'd suggest
using property paths. The '*' syntax will give you a path of zero or
more occurrences of bio:ancestorOf. So in effect, it computes the
transitive closure of the property:
SELECT ?ancestor
WHERE
{ ?ancestor bio:ancestorOf* :me .
}
A '+' will get you one or more occurrences. I.e. a * gets all
ancestors, including :me - the transitive closure. A + get you all
ancestors (not including :me).
-- Scott
>Perhaps, someone could review the relationship vocabulary for me. I don't have
> the link handy but it should be easy to find.
> I am doing this on a semantic mediawiki install so I don't know if
> there is any extension to mediawiki to perform reasoning on data in a
> semantic mediawiki site.
> Thanks for any help or feedback,
> Bruce
>
> On Feb 15, 12:45 am, "Irene Polikoff" <[email protected]> wrote:
>
>
>
>
>
>
>
> > Umar,
>
> > 1) Your query looks correct. What do you mean by "not working"?
>
> > . Star (*) operator performs transitive closure. It will get all
> > subclasses transitively
>
> > 2) Looks OK as well, except if you want to select both, uri and the
> > label, you should put ?uri ?l1 after SELECT
>
> > 3) You can use one of the functions included with TopBraid -
> > spl:relevantPropertyAtClass
> > <http://127.0.0.1:2506/help/topic/org.topbraidcomposer.help/html/smf.h...
> > l:relevantPropertyAtClass> : this is a magic property that establishes a
> > relationship between properties (left) and classes (right) to determine
> > which properties are "relevant" for the class. So, you could use a pattern
> > like {?p spl:relevantPropertyAtClass pz:Pizza} to get all properties for
> > the class pz:Pizza
>
> > 4) This page shows an example web service that takes an argument and
> > explains how to create
> > it:http://www.topquadrant.com/products/SPARQLMotion_docs/SPARQLMotion_ex...
> > aCapitals.html. You may also want to look at this
> > presentationhttp://www.topquadrant.com/docs/sparqlmotion/SemanticWebServices_in5s...
> > ingTopBraid.pdf
>
> > Regards,
>
> > Irene Polikoff
>
> > From: [email protected]
> > [mailto:[email protected]] On Behalf Of umar farooq
> > Sent: Tuesday, February 14, 2012 11:45 PM
> > To: [email protected]
> > Subject: Re: [topbraid-users] Re: Processing 10,000 files
>
> > Hi guys,
>
> > I have some problems if you can solve i will be thankful to you.
>
> > 1) First of all i need query that returns SubClasses of owl:Thing.
>
> > i wrote this one. is it correct.
>
> > SELECT ?cls
>
> > WHERE
>
> > { ?cls rdfs:subClassOf* owl:Thing .
>
> > }
>
> > it is not working...?
>
> > and what is * in rdfs:subClassOf*.
>
> > 2) I want labels of the classes as well as classes uri
>
> > I wrote this query
>
> > "PREFIX rdf:<
> > <http://www.w3.org/1999/02/22-rdf-syntax-ns>http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> > "+
>
> > "PREFIX rdfs:<
> > <http://www.w3.org/2000/01/rdf-schema>http://www.w3.org/2000/01/rdf-schema#>
> > " +
>
> > "PREFIX owl:<
> > <http://www.w3.org/2002/07/owl>http://www.w3.org/2002/07/owl#> " +
>
> > "PREFIX pz:<
> > <http://www.co-ode.org/ontologies/pizza/2005/10/18/pizza.owl>http://www.co-ode.org/ontologies/pizza/2005/10/18/pizza.owl#>
> > " +
>
> > "Select ?l1"+
>
> > " WHERE { "+
>
> > "?uri rdfs:subClassOf pz:Pizza ." +
>
> > "?uri rdfs:label ?l1 ."+
>
> > "}";
>
> > But it gives wrong results
>
> > 3) I want to get all the properties of the class when a user clicks on the
> > class as protege dose. What would be the query.
>
> > 4) How to pass argument to the web service. Such that if i want to find All
> > subclasses of Pizza then i should pass pizza in argument.
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