On Mon, Oct 6, 2008 at 6:30 AM, Roger Hyam rogerhyam@mac.com wrote:
I am not sure I understand the problem. In RDF any non-literal can be represented as a URI or a local id and can therefore be the subject of an assertion (triplet). How can there not be a place to hang something? You can hang anything anywhere!
Umm, I may be confused but (a)I think It is not the URI about which we need to make assertions, but rather the triple which has that URI as object of rdf:about in Ben's suggestion. (b)I thought you cannot reify a triple by using rdf:about, but must use a relative URI defined by rdf:id
Yes you can hang anything anywhere, but if you do, it seems not that hard to slip out of OWL, let alone OWL DL, or in our case, to slip out of being a valid SPM instance, such as in our initial attempt to use a URI as the object of hasInformation.
Are we talking here about XML Schema validated XML representation of RDF?
Terry and I are talking about triples. We generate XML/RDF but we test our results with RDF and OWL validators.
Roger
On 5 Oct 2008, at 17:10, Bob Morris wrote:
In our GBIF/EOL/Plazi SPM project, Terry Catapano and I have formed the conclusion (I hope wrong...) that there is not any place on several lsidvoc objects to hang an lsid (or any other GUID) asserted to identify that object. For example, we don't see any place to put one on a TaxonConcept or on a PublicationCitation. In the October 1 example at http://wiki.tdwg.org/twiki/bin/view/SPM/PlaziEOLProject we have a placeholder hack using
<tc:TaxonConcept rdf:ID="_tc2"> <tc:nameString xml:lang="en">Dodous bispinosus</tc:nameString> tc:hasInformation rdf:resource="urn:lsid:biosci.ohio-state.edu:osuc_concepts:143647"/ ... </tc:TaxonConcept>
but this is not valid in the tdwg ontology because hasInformation requires an InfoItem as its object.
We use other objects that face this problem, e.g. TaxonName, and I guess it is quite a broad issue (or not an issue at all if we are wrong).
Can someone recommend a valid way to address this, either for these three objects, or preferably, in general? If so, thanks in advance. If we are right, how about adding an InfoItem class named GUID, that includes an enumeration of the usual suspects, suitably typed.
Bob
Robert A. Morris Professor of Computer Science UMASS-Boston ram@cs.umb.edu http://bdei.cs.umb.edu/ http://www.cs.umb.edu/~ram http://www.cs.umb.edu/~ram/calendar.html phone (+1)617 287 6466 _______________________________________________ tdwg-tag mailing list tdwg-tag@lists.tdwg.org http://lists.tdwg.org/mailman/listinfo/tdwg-tag
Roger Hyam Roger@BiodiversityCollectionsIndex.org http://www.BiodiversityCollectionsIndex.org
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