I think you should make some difference between ERM and RMD. ERM is
infological model - it tryes to describe some enterprise, its
entitites, relationships ets, what exist in real world (or rather what
some persons think about this enterprice, becouse other person can
imagine it in other way). RMD is datalogical model - it offers formal,
and IMHO universal way how data must be organised. So it means, that
relations can contain any data - it doesn't matter is this data on
entities (ERM's term), on relationships (ERM's term too) or anything
else if we will use other infological model. Use names! :). If the
relation has the name "SomeEntityName" it is very possible that it
really contains data on the entity (But I'm not sure:). If it names as
"SomeRelationshipName" I will wait that it contains data on the
relationship, which can have some attributes of course.
Received on Thu May 04 2006 - 08:33:54 CDT
