ISO 10303-1169:2005 specifies the application module for Activity structure and classification. The following are within the scope of ISO 10303-1169:2005: the existence of an individual activity; a whole-part relationship between two individual activities; a connection relationship between two individual activities; an involvement of a product, document, person, organization or other activity in an individual activity; the existence of a class of activity; a mapping between one class of activity and another that indicates the nature of a whole-part relationship between two individual activities; a mapping between one class of activity and another that indicates the nature of a connection relationship between two individual activities; a mapping between a class of activity and another class that indicates the nature of an involvement in an activity; set theory relationships, such as subset, union and intersection, between classes of activity and between mappings; the classification of an individual activity as a member of a class of activity; the classification of a relationship between individual activities as a member of a mapping; the specification of the complete membership of a class of activity or of a mapping between classes of activity; reference to an externally defined class of activity or activity relationship.