Physical constitution / realization relation type

The source is a material constituent, structural component, or underlying quantum field whose excitation realizes the target physical system or particle. The edge label and detail must distinguish composition from field excitation; neither implies a simple classical sum of parts.

Directed semantics

Every direct mAtlas edge is an authored source → target assertion of this type.

Term code: composition
Source role: Constitutes / realizes
Target role: Constituted / realized by
Direct relations in this release: 55
Predecessor-level policy: incoming
Prerequisite traversal: incoming

Machine-readable record

/data/latest/relation-types/composition.json provides this definition and the IDs of every direct relation of this type.

A path may traverse an edge backwards for connectivity, but that never reverses the authored source-to-target assertion.