"This is the official Pocket Guide for the ArchiMate® 4 Specification - your essential quick reference for the ArchiMate modeling language. It provides a condensed reference to the modeling language in a portable format. What’s more, it’s authoritative, with material derived from The Open Group ArchiMate documentation. The ArchiMate 4 Specification, a standard of The Open Group, defines an open and independent modeling language for Enterprise Architecture that is supported by different tool vendors and consulting firms. It provides a notation to enable Enterprise Architects to describe, analyze, and visualize the relationships among business domains in an unambiguous way. Version 4 represents a substantial evolution of the standard, including housekeeping to clean up and streamline the standard to improve its ease of adoption and use. The audience for this document is: Enterprise Architects, Business Architects, IT architects, Data Architects, system architects, solutions architects, and senior managers seeking a first introduction to the ArchiMate modeling language. A prior knowledge of Enterprise Architecture is advantageous but not required. Topics covered include: • A high-level introduction to the ArchiMate Specification, its relationship to Enterprise Architecture, and an overview of the changes in Version 4 of the specification • The structure of the ArchiMate modeling language, including the top-level structure, aspects, domains, the ArchiMate core language, and the ArchiMate full language • The structure of the common, generic ArchiMate elements • The relationships in the language • The concepts for expressing the motivation for an architecture • Elements for modeling the enterprise at a strategic level • The definition and usage of the Business Domain elements • The definition and usage of the Application Domain elements • The definition and usage of the Technology Domain elements • The relationships between different domains of the language • The language elements for expressing the implementation and migration aspects of an architecture • The ArchiMate viewpoint mechanism, and the example viewpoints provided with the standard • A language notation summary"