A.14:6 - Choosing the right relation (decision table)

You want to say…	Use	Why
“This is a piece of the same stuff or extent.”	PortionOf	One extensive measure and conservation rule govern the claim.
“This is a discrete structural part inside the whole.”	ComponentOf	The part is structurally integrated; amount and facet selection do not decide it.
“This is a logical or content part of a conceptual whole.”	ConstituentOf	The claim concerns conceptual or epistemic assembly.
“This dependent structural part is one aspect of this bearer under this facet rule.”	AspectOf	Name the aspect, bearer, facet rule, occurrence, and identity rule; a Characteristic, view, projection, partition, or time window is not enough.
“This is the same entity during a proper sub-interval.”	PhaseOf	The same carrier and its identity rule hold over a proper temporal restriction.
“This item belongs to that collection.”	The belongs-to rule defined for that collection	Name the entity and collection, state what makes belonging begin and end, and distinguish recurrence. Belonging establishes neither parthood nor its impossibility.
“This System is classified by a local work-facing kind, has an assignment to that kind, or participates in a direct relation.”	The corresponding local system-role-kind classification, `U.SystemRoleAssignment`, or direct relation participation; use A.6.5 when the relation needs reusable participant typing.	Kind classification, assignment occurrence, and relation participation are not parts.

Firewall reminder. If the sentence is about system-role-kind classification or assignment, how action is done, or what happened when, use A.2/A.2.1, A.3.1, or A.15.1 as appropriate. For an episteme, use A.14 for content parthood or a proper interval of one unchanged C.2.1 identity; changed claims, EntityOfConcern, or effective reference scheme identify another episteme, and any historical continuation uses C.2.1 EpistemeEditionRelation only when its predicate obtains.