CWM12 — Practical changes to Contact metamodel

These are gained from having tried to use the model in real situations.

a) Add new attribute Contact.applicability: String (0..1), to allow a fuller description of when that

contact should be used (e.g. "After hours or weekend emergencies only: when completion of a

time-critical run is threatened").

b) the associations between COntact and its constituent parts (Telephhone etc) should be shown as aggregations (not compositions) for clarity. This will have no effect on generated code/DTDs.

c) split the phoneNumber attribute into its constituent parts. This is because the actual number to ring is dependent on context), and there may be uses where automatic dialing is required (e.g. for fax/pager access to contacts). [It is assumed that the calling progam knows what country/area it is dialing from). The proposed replacement attributes (all optional and of type String) are: countryCode inCountryAreaPrefix (e.g. for UK it would be "0" - one dials +44 1202 449419 outside UK but 01202 449419 inside UK) areaCode corePhoneNumber.