[tdwg-content] New Darwin Core terms proposed relating to material samples
steve.baskauf at vanderbilt.edu
Wed Jun 12 16:51:09 CEST 2013
For reasons elaborated in the DwC RDF guide and probably several places
in the RDF Task Group wiki, none of the ID terms as they are presently
defined can be used effectively in RDF. I'm not going to elaborate here
because anybody who cares can read the details in the draft of the
guide. But the crux of the issue is that all of the ID terms are
currently defined as subClassOf dcterms:identifier. That means that a
client can infer that the identifier given as the value of the term is
the identifier of the subject of the triple, not the object of the
triple as would be assumed for a predicate like hasIndividual,
If we want to use the ID terms in RDF, the subClassOf declarations would
have to be removed from their definitions.
Even if the definitions were changed, there is still an ambiguity issue
which can be seen in the example in the XML guide. Again, I'm going to
refer interested parties to the draft RDF guide.
John Deck wrote:
> 3. In RDF, all resources are identified by URI, and (should be)
> referenced by appropriate predicates (hasIndividual,
> hasOccurrence, etc.) So my understanding is that all the recent
> discussion about xxxIDs pertains only to non-RDF records. Is that
> Not necessarily.
Steven J. Baskauf, Ph.D., Senior Lecturer
Vanderbilt University Dept. of Biological Sciences
postal mail address:
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