Steve; I believe the following query will work for you:
SELECT ?avfCls
WHERE {
?cls rdfs:subClassOf ?x .
?x owl:allValuesFrom ?avfCls .
}
...and with SPARQL 1.1 Property Paths this can be shortened to
SELECT ?avfCls
WHERE {
?cls rdfs:subClassOf / owl:allValuesFrom ?avfCls .
}
Keep in mind that the graph pattern matching does the iteration for
you. Recursive solutions are rarely needed.
-- Scott
On Feb 8, 5:41 pm, "Steve Ray (CMU)" <[email protected]> wrote:
> I have been working on writing a graph-traversal algorithm using SPARQL
> queries and function calls, and it occurs to me that someone in this group
> might have already done this. I am trying to transitively follow all of the
> owl:allValuesFrom restrictions from a given starting class. The two
> challenges are that this involves a double-hop from one class to the next
> (rdfs:subClassOf followed by owl:allValuesFrom), and that such a traversal
> typically has many cycles (i.e. closed loops) within it, most trivially with
> bidirectional relations.
>
> If anybody has done this, either elegantly or otherwise, I'd love to see
> your solution. Meanwhile, I will share with this group when and if I get
> mine to work.
>
> - Steve
>
> Steven R. Ray, Ph.D.
>
> Distinguished Research Fellow
>
> Carnegie Mellon University
>
> NASA Research Park
>
> Building 23 (MS 23-11)
>
> P.O. Box 1
> Moffett Field, CA 94305-0001
>
> Email: [email protected]
>
> Phone: (650) 587-3780
>
> Cell: (202) 316-6481
>
> Skype: steverayconsulting
>
> 10yr-logo-sm
>
> image001.jpg
> 12KViewDownload
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