Identify model elements by a tuple of attributes

Question

Identify model elements by a tuple of attributes

gnain opened this issue 11 years ago · 2 comments

This feature would enable to specify that a model element is uniquely identified by a not ordered tuple of attributes.

Answer 1 · 2013-07-09T12:59:58.000Z

You mean something similar to compound primary keys?

Answer 2 · 2013-07-09T13:04:46.000Z

Yes, kind of :-)
The problem of "compound" key is the composition that means ordering the attributes. Moreover, this composition would hide a bit the fact that the unicity is computer over several attributes.
That's why I talk about not ordered tuples of attributes, so you can specify the values for each attribute composing the key rather than composing the key by yourself (that would again require an ordering of the keys).