[m-rev.] for review: improvements to relation.m

[Mark Brown]

On 05-Sep-2007, Peter Ross <pro at missioncriticalit.com> wrote:
> On 9/5/07, Ralph Becket <rafe at csse.unimelb.edu.au> wrote:
> > Julien Fischer, Wednesday,  5 September 2007:
> > > >I also considered changing "key" to "vertex", "element" to "value", and
> > > >changing the module name to directed_graph or dgraph (I prefer the latter).
> > >
> > > I prefer the name digraph.
> >
> > digraph or directed_graph.
> >
> digraph.
> 
> please also mark all the relation predicates obsolete. (do we have an
> obselete module declaration?)

I opted for marking just the initialisation predicate and function as
obsolete.  It's really only the person who creates relations who needs to
be told that they are obsolete -- a person forced to use somebody else's
relations shouldn't be warned about it (except when they compile the other
person's code).

Cheers,
Mark.

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