Re: [Dotnetrdf-support] Rulebase

[Rob V. <rv...@do...>]

Hi Tomas

There is not really any rules support in the 0.3.1 release that can do what you want but it is very straightforward to do with SPARQL queries e.g.

PREFIX : <http://example.org/czechRoyals#>


SELECT ?grandFather ?grandSon

WHERE 

{

  ?grandFather :fatherOf ?x . ?x :fatherOf ?grandSon

}

If you want to generate actual Triples with this data you can either turn the above into a CONSTRUCT query to generate a Graph with the additional data like so:

PREFIX : <http://example.org/czechRoyals#>


CONSTRUCT 

{

    ?grandFather :grandFatherOf ?grandSon .

}

WHERE 

{

  ?grandFather :fatherOf ?x . ?x :fatherOf ?grandSon

}

Or if you have a Triple Store which supports SPARQL Update (such as the TripleStore class in dotNetRDF) then you can create a SPARQL Update command to add the generated data straight back into the Store e.g.

PREFIX : <http://example.org/czechRoyals#>


INSERT

{

    ?grandFather :grandFatherOf ?grandSon .

}

WHERE 

{

  ?grandFather :fatherOf ?x . ?x :fatherOf ?grandSon

}

Hope this helps you get started, please ask if you have further questions/issues.

Best Regards,

Rob Vesse

----------------------------------------
From: "Tomas Franek" <tom...@se...>
Sent: 15 December 2010 16:25
To: rv...@do...
Subject: Rulebase 

I tried your dotnetRDF in my school project and I need help with using rulebase.

I have triples that describe Czech kings family

sample:

Object "Jan Lucembursky"
Predicate  "FatherOf"
Subject "CharlesIV"

Object "CharlesIV"
Predicate "FatherOf"
Subject "Jan"

Object "CharlesIV"
Predicate "FatherOf"
Subject "Vaclav IV"

Object "VaclavIV"
Predicate "FatherOf"
Subject "Marketa"
.
.
.
.
.

I woud like create rule "GrandFatherOf", and make qeury that show  all couples grandfather and grandson(granddaughter )

can you help me with this?

Tomás Franek