Keystone EA's metamodel is the foundation of an organization's architecture, built for agility and resilience. Organise the business into 7 layers with 20 object types, and 6 relationship types to link them together. A rule system governs the chaos.
Every element in the Keystone EA™ model is defined by a distinct object type. Each object type lives in a specific layer.
Relationships carry meaning through their line style and arrow head. One is universal; the other five are qualified and governed by the rules below.
Each glyph shows direction from source to target. Composition carries a diamond at the containing end. Flow uses a hollow arrowhead, Realization and CRUD a solid one (CRUD dashed), and Supporting an open chevron. Connection is a plain, undirected line — the only relationship valid between every pair of objects.
This matrix is the heart of the metamodel: for every source → target pairing, it shows which relationship types are permitted. Rows are the source object, and columns are the target. Toggle a relationship to isolate it.