E.18.2:4.3 - Five-way subject, description, lens, and publication discriminator

Use this discriminator before writing or accepting a mathematical description:

If the claim selects one TFS or its internal flow structure, use E.18.
If the claim selects independently identified TFS or nested-network members plus exact cross-member relations, use E.18.NET.
If the claim describes exactly one selected TFS or network with mathematics, use E.18.2.
If the claim evaluates that mathematical lens use, use C.29 with the E.18.2 description reference.
If the claim publishes a graph, table, equation, diagram, card, or other face, use E.17 and the relevant view or architecture-description pattern.

The same visible source may require several records, but each E.18.2 description chooses one described ontic subject branch. A refrigerator principle scheme may include an E.17 publication face, a functional-architecture view, one selected E.18 TFS, a thermodynamic mechanism claim, and an E.18.2 graph or equation description. A network diagram may similarly publish an E.18.2 description of one already selected E.18.NET network. If the expression is evaluated as a lens, apply the C.29 adequacy test; if it is rendered or published, identify the E.17 publication face and any current view or architecture-description membership. Neither record reidentifies the TFS or network.