This Recommendation | International Standard provides:

a) a language (the enterprise language) comprising concepts, structures, and rules for developing, representing, and reasoning about a specification of an Open Distributed Processing (ODP) system from the enterprise viewpoint (as defined in ITU-T Rec. X.903 | ISO/IEC 10746-3);

b) rules which establish correspondences between the enterprise language and the other viewpoint languages (defined in ITU-T Rec. X.903 | ISO/IEC 10746-3) to ensure the overall consistency of a specification.