Re: Arcs

Hi Patrick,

[...]
> Not that I necessarily disagree but what do you mean by:

> "properly defined role types"?

> I read the post as saying an arc starts/end at role types. Yes?

The proposal defines the role types "from" and "to". An author may be
tempted to say:

   sean child-of john

which leads to the following association:

   child-of(from: sean, to: john)

That's crappy since it does not say that sean plays the "child" role
and john the "father" role.

Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>

<http://www.topicmaps.de/mailinglist/> German Topic Maps mailing list
<http://tinytim.sourceforge.net/> Open Source Topic Maps engine
<http://mappa.semagia.com/> Mappa - Python Topic Maps engine