Types
Article 5
1. For all types defined in this Regulation, a language-neutral name for computers is given between parentheses in the title of the section specifying the requirements for that type. This language-neutral name shall be used for referring to the corresponding type in the definition of an attribute or association role. 2. Types that are a sub-type of another type shall also include all this type’s attributes and association roles. 3. Abstract types shall not be instantiated. 4. Candidate types shall be considered during the development of requirements for the spatial data theme they thematically belong to. During this development, the only allowed change to the specification of the candidate type is to extend it.