[sc34wg3] Questions on N0396: (2) one or more association memberships

Robert Barta sc34wg3@isotopicmaps.org
Sat, 19 Apr 2003 11:59:53 +1000

On Fri, Apr 18, 2003 at 05:39:50PM +0200, Lars Marius Garshol wrote:
> * Jan Algermissen
> | "An association is a relationship between one or more subjects."
> | 
> | This implies that there can be a "relationhip between one subject".
> | Could you clarify what that is allowed and what meaning an
> | association with only one membership is supposed to convey?
> | I suggest to constrain the cardinality of the [roles] property of an
> | association item to be two or more.
> No can do, since that would break backwards compatibility. 

...and it would uselessly complicate a formalism over associations.
I could even live with associations with an empty member set (don't
ask me what this should mean, though).