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Library / First Principles Framework (FPF) - Core Conceptual Specification
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A.2:4.8 - System-Role Vocabularies and Relations among Kinds

A system-role-vocabulary or taxonomy episteme may state local kind names, declarations, and selected relation claims under an effective reference scheme. Each live kind needs the C.3 distinction that lets readers recover it; each judgment cites its actual signature edition. An assignment claim separately requires an obtaining A.2.1 relation.

Use A.2.7 to state one selected SystemRoleKindRelationStructure over exact local system-role kinds and admitted relations among them. A receiving use can cite an assertion about substitution, incompatibility, bundle, qualification, or another residual relation alongside separately stated assignments, state, capability, and Work. Systems and assignments are not participants of the kind-relation structure.

Algebraic, graph, matrix, embedding, or neural representations are mathematical lenses over that selected structure when a project declares the lens use. They neither create the kinds nor make a relation obtain.

System-role kindRecognition caseBoundary
CoolingCirculatorSystemRoleA pump supplies a circulation contribution in plant operation.Capability, assignment, functioning, and performed Work remain separate.
TestArticleSystemRoleThe same pump is selected for qualification use.The classification or assignment does not change pump identity.
VerifierSystemRoleA person, team, organization, service, or non-human technical system supplies verification contribution under its local criterion.A verification report is an episteme, not the classified system.
TransformerSystemRoleA system is classified for a transformation-facing contribution.For performed Work, name the performer system.