Canonical reference map for the PRE-GHR publication series: numbering map, layer architecture, versioning convention, citation format, related records, revision history. v27 (2026-08-13): XXXIX v4.0 (version DOI 21921018) — composition theory restructured, second proof-audit round (GPT) signed PROOF-AUDIT PASS + Zenodo-ready: Theorem 2's hypothesis changed SA to A1 + A3 (A3 alone does not yield segmentwise admissibility; the factorization clause of A1 supplies P'_i in D(P_i); A1 moved before Theorem 2 in the exposition); the v3.5 retention-structure lemma's clause (ii) was false and replaced by the RNC + A3 hypothesis hierarchy; the exact composition law now requires A1 + A2 + A3. Machine-verified post-publish: DOI handle responseCode 1, concept 302 to latest v4.0, published PDF md5 == local (480e7859...). Record count: 37 (25 series-internal).