[Nml-wg] References

[Jerry Sobieski]

If I understand this correctly, and if I also understand the usage 
context with regard to "topologies", I vote for the isDefinedBy 
construct as we will be looking to acquire what is likely to be a 
substantial amount of topology information that is maintained in a 
separate document somewhere.

And I would salute the desire to keep multiple representations as 
similar as possible.

(just letting you know I am following these discussions:-)
J
On 9/20/12 8:44 PM, Freek Dijkstra wrote:
> On 20-09-2012 17:13, Jeroen van der Ham wrote:
>> Hi,
>>
>> We've been discussing references, meaning things that are not defined
>> locally, but you do want to provide additional information about
>> them. For XML there has been a proposal to use id / idRef to denote
>> something like that. Unfortunately it is not very easy to port that
>> construct to RDF/OWL. The only way to express something like that in
>> RDF/OWL is by using a relation. Fortunately a relation like that
>> already exists in the form of rdfs:isDefinedBy. This states that an
>> object is actually defined by another description, and conveniently
>> provides the URL of that description to reference it.
>>
>> Could we perhaps use the isDefinedBy construct also in XML to make
>> the reference definition somewhat more explicit? This would really
>> help keeping the difference between the two syntaxes at a minimum
>> also.
> A summary of the earlier discussion:
>
> idRef is suppossed to be a shortcut for id + isReference True.
>
> isReference is supposed to mean that the object was defined elsewhere,
> like in another document/by another organisation (there was still a
> discussion between Aaron and myself if 'elsewhere' may or may not
> included 'elsewhere in the file --- thinking about it now, I would say
> 'in another Topology').
>
> The distinction between isReference and isDefinedBy is that isReference
> only tells the parser that it is defined elsewhere; isDefinedBy also
> tells the parser where it is defined.
>
> I have no preference. Based on Jeroen's proposal and the earlier
> discussion, what it most useful?
>
> Freek
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