W3C home > Mailing lists > Public > public-rdf-shapes@w3.org > July 2014

Re: using Shape Expressions to validate RDF graphs

From: Jose Emilio Labra Gayo <jelabra@gmail.com>
Date: Sat, 12 Jul 2014 00:33:05 +0200
Message-ID: <CAJadXXLBykkAkb+QfhdHyK3TBD2xuD2WtEJgHYiHzJFzrNhcBg@mail.gmail.com>
To: "Peter F. Patel-Schneider" <pfpschneider@gmail.com>
Cc: Karen Coyle <kcoyle@kcoyle.net>, "public-rdf-shapes@w3.org" <public-rdf-shapes@w3.org>
>>  With regards to the spouse/person, I think what you want to describe can
>> be
>> done as:
>> <PersonShape> { :a (:Person), :spouse @<SpouseShape>? }
>> <SpouseShape> { :a (:Person), ^:spouse @<PersonShape> }
>> The last declaration contains a reverse arc, which means that a
>> SpouseShape is
>> the object of an arc :spouse with shape PersonShape.
> I still don't see how this tells me whether all the nodes that have an
> rdf:type link to :Person have all their spouses have rdf:type links to
> :Person.

What it tells you is that if you select a node in the graph and you want to
check if it has the Shape of a Person, you can have a system (a Shape
Expression validator) that will check if it has the properties rdf:type
with value :Person and :spouse with a value that also has rdf:type :Person.

I mean...the Shape Expression validator is just looking at the shape of the
RDF graph...that's why it is working in a more syntactic level than RDFS,
OWL, etc...and that's why I think both are complementary technologies.

Best regards, Jose Labra

Received on Friday, 11 July 2014 22:33:51 UTC

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