English: Part of the metamodel for the open source TRAK architecture framework. Presents the triples (node - connector - node) that form the statements used by TRAK architecture views to describe the architecture of the real world. These triples provide the means to define an architecture view - the concerns framed, the triples that address these concerns. They are used to define both the required and the allowed triples defined by an architecture viewpoint and hence part of the specification for a TRAK architecture view. The triples have been taken from the (non-TRAK) Viewpoint Definition Viewpoint in 3736126-001 July 2020 Architecture Viewpoints. Metamodel Description, Implementation and Model Changes. https://www.researchgate.net/publication/ 335176248_Architecture_Description_Viewpoints_Metamodel_Description_Imp lementation_and_Model_Changes