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
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