[sc34wg3] RM4TM SLUO : Objective or Requirement?

[Bernard Vatant]

> * Bernard Vatant
> | If I understand well the SLUO, out of RM prose and recent Steve Newcomb's
> comments,
> | SLUO is not expressed by 3.4.1 but by the reverse:
> |
> | "In a topic map graph, every subject is represented by a single node" [2]
> |
> | That I can't find anywhere explicitly expressed in the document - did I miss it?

*Marc de Graauw
> 3.9 says:
>
> "In a well-formed topic map graph, every node represents a single subject, but
> some subjects may be represented by more than one node. In a fully merged
> topic map graph, every subject is represented by a single node."

Oops. I had missed that one indeed. It figures you can never be sure when a topic map
graph is fully merged ...

> | OTOH if SLUO is only an Objective, it should be expressed by:
> |
> | Recommendation:
> | "In a topic map graph, every subject *should be* (as far as possible)
> represented by a
> | single node" [3]

> I completely agree. SLUO can never be more than a (very important) design
> guideline. One can never be sure subjects are actually represented by only one
> node (topic) since human knowledge is only partial...

Amen.