[tcs-lc] Name-Name Relationships vs. Concept-Conceptrelationships

[Sally Hinchcliffe]

Rich wrote:
> 
> For what it's worth, I agree 100% with Gregor's points as outlined below.
> But I suspect this is well beyond the "minor" catgeory, and thus probably
> best left for a later discussion (i.e., after Sep. 30).
> 

>From what we discussed last week I think in the end the discussion 
turned on what would be easiest to both produce and to parse. At 
which point a lot of handwaving ensued ... I agree this isn't minor 
and hopefully after some people have had a go at writing wrappers for 
both Name Objects and full-blown concepts we will have some more 
facts to throw at the discussion. Definitely one for version 2.0 :-)

> > Some points:
> >
> > - Controlling an enumeration is equally strong with controlling
> > the sequence in
> > schema.
> >
> > - Extending a sequence of elements is more difficult in an upgrade than
> > extending an enumeration. That applies both to applications based
> > on tcs and to
> > the schema itself.
> >
> > - Fundamentally, the sequence of role-element-names is a
> > collection, not a
> > sequence. Order has no meaning here.
> >
> > - The two cases are fully separated by structure (in different
> > context). Even
> > if for nomenclatural relations the enumeration-value method would
> > be used, it
> > is impossible to mix the two purposes.
> >
> > - However, my gut feeling is that Nomenclatural relations are
> > icomplete. If
> > they aren't, any change in the codes will make them so. So
> > extension of these
> > relations (for valid reasons, not in an attempt to confuse with concepts)
> > should be supported.
> >
> > - Finally, the similarity with LC does not convince me. the flattened out
> > design of original LC was designed to allow flat table
> > representation, which is
> > a value. However, this is not preserved, at least two relations
> > are collections
> > rather than single.
> 
> 
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*** Sally Hinchcliffe
*** Computer section, Royal Botanic Gardens, Kew
*** tel: +44 (0)20 8332 5708
*** S.Hinchcliffe at rbgkew.org.uk