Based on the ArchiMate 3 documents or objectives, the top-level language structure of the ArchiMate concepts defines four types of elements: Behavior, Composite, Motivation, and Structure. Behavior elements represent units of activity performed by one or more active structure elements. Composite elements represent collections of other concepts that belong together based on some criteria. Motivation elements represent the reasons for designing and implementing an architecture. Structure elements represent structural concepts that model the static construction or composition of concepts of the same or different types.
References: ArchiMate® 3.2 Specification, Chapter 3 Language Structure, Section 3.2 Top-Level Language Structure 1; ArchiMate - Wikipedia 2.
