Leif,
Leif Johansson wrote:
If you want to be able to indicate the presence of a feature with an optional attribute, yes that is exactly how you do it. Object- classes are you friend. Orthagonal design is good.
Note that for security reasons it might not appropriate in some cases to give someone or a process write access to the multi-valued object class attribute. Therefore it is not always possible to indicate the presence of a feature by presence of an auxiliary object class.
But maybe I misunderstood you...
Ciao, Michael.
Read and write access is independent!
MVH leifj