C.20:4.2 - Direct DisciplinePartOfRelation

C.20 directly governs DisciplinePartOfRelation, expressed in Plain register as disciplinePartOf(partEntity, candidateDiscipline). The first participant is one exact U.Entity already identified under its subject pattern. The second is the exact candidate U.Entity under the C.20 test; this participant meaning does not presuppose that the candidate has already passed the test.

The predicate obtains throughout an interval exactly when all of the following are true:

• the candidate’s actual field assembly includes the exact part as a required contributor or a currently realized admitted alternative for one required knowledge-bearing or reusable-practice contribution;
• at least one exact whole-forming claim is true: that contribution connects to the candidate’s field boundary, to another required contribution, and to the declared composition-grounded whole characteristic;
• the candidate’s direct reidentification rule treats the current part, its contribution, and any allowed replacement as belonging to this continuing assembly.

Mere eligibility for future use is insufficient. A source citation, canon list, standards list, registry row, curriculum position, organizational affiliation, publication, common label, diagram containment, shared audience, bridge endpoint, comparison row, selected structure, work participation, evidence relation, or health reading does not make disciplinePartOf obtain.

One occurrence is identified by <exact part entity, exact candidate, maximal continuous obtaining interval>. If the same part leaves the assembly and later returns, the two episodes are distinct occurrences. A changed observation or evidence window does not split an ongoing occurrence; actual cessation and resumption under the direct predicate do. Reidentifying either participant also identifies another occurrence.

Multiple contribution claims for the same part do not create several part occurrences during the same continuous interval. If typed declaration reuse is needed, the direct relation has only the two participant meanings above. Canon, practice, organization, bridge, comparison, policy, evidence, publication, and structure fields are not additional SlotSpecs. Qualifiers and whole-forming claims keep their subject patterns.