In the current revsion of the AOM, the constraint_model package contains a number of
functions that are defined on the wrong classes or in the wrong way. These are:

• assumed_value; currently defined both on C_DOMAIN_TYPE and on C_PRIMITIVE_OBJECT (repetition)

• any_allowed, currently defined as an attribute on ARCHETYPE_CONSTRAINT, but can in fact be
  defined functionally in terms of other attributes on all classes

• valid_value, currently defined on C_DOMAIN_TYPE, but needed on C_COMPLEX_OBJECT and C_PRIMITIVE_OBJECT

• default_value, currently defined on C_DOMAIN_TYPE, but needed on C_COMPLEX_OBJECT and C_PRIMITIVE_OBJECT