issues in class Actor from the demographic package

[Sergio Miranda Freire]

The initializer lacks the argument parent and so does the superclass initializer..
wouldn't be interesting to define a representation function for this class?
The invariants should be enforce:
Roles_valid: roles /= Void implies not roles.is_empty
Languages_valid: languages /= Void implies not languages.is_empty

The issues below should be considered in a new MLHIM version:
    The invariant Legal_identity_exists in class org.openehr.rm.demographic.Actor seems too restrictive. While it is expected that every actor has at least an identity with the purpose "legal identity", there may be situations where one has to register a person that has not a known legal name at the moment of registration, for example, a newborn who is not registered yet or an unconscious person in a emergency room and without any identification.

My suggestion is to remove this invariant from the specifications.

    The function has_legal_identity in class org.openehr.rm.demographic.Actor seems to be misspecified. The function has_legal_identity returns True if there is an identity with purpose "legal identity". This condition should be expressed in a language independent way. In ISO 22220, it is referred not as "legal identity" but as "registered name or legal name".

 I think that this function should be left out of the specifications since it application and terminology dependent.