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Extends the preface comparison (RG 482-499) with a third, independent
publisher, extraordinaryform.org's three annual Ordo editions
(2024-2025, 2025-2026, 2026-2027), previously declined for two reasons
that are now resolved:
- "Advent" is not a preface: RG 494(b) grants the Trinity preface on
every Advent SUNDAY, RG 498 the residual Common on every Advent
FERIA; this source's own "Advent" label covers both indiscriminately
(confirmed live on all 11 non-impeded Advent Sundays in the corpus).
Classified by the day's own civil weekday, not a static table.
- The known Vigil-of-St-Lawrence gap is reconfirmed, with a nuance not
present in the earlier audits: colitur's own RG33-third-trigger now
omits the vigil in some years too, so the corpus's gap and colitur's
answer coincide in 2025 (a full match, not a coincidence) while 2027
still shows the classic identity-wrong-but-preface-invisible shape.
Re-derives the known menu-trap office filter (Requiem-skip, "and "-chain)
against the live JSON and finds a second, general pattern: "Saturday of
Our Lady" (RG78's BVM Saturday Office), whenever listed, is
unconditionally the office -- checked exhaustively across all 38
instances in the corpus, zero counter-examples. A third, generic
"absorption" rule was deliberately not built: it would resolve 2 of the
11 residual divergences but wrongly misfires on a structurally identical
but semantically different shape (an optional Rogation-day Mass option).
The JSON's own extraction carries a genuine classifier gap: parse_ordo.py's
hardcoded PREFACES set omits "Christ the King", misfiling it into comms;
recovered in the generator, not left blank.
11 of 1088 comparable rows diverge, resolving to 7 adjudicated root
causes (E1-E7): two Commemoration_only Marian titles reduced to
commemorations (Mt Carmel, Ransom), two genuine sanctoral data gaps
cross-confirmed absent by the FIUV/LMS witnesses (Miraculous Medal,
St John before the Latin Gate), two single-witnessed efdotorg outliers
against FIUV/LMS agreement (St Michael's Dedication, All Saints on a
Sunday), and one isolated source labelling slip.
Mutation-tested: corrupting the RG495 BVM-Saturday clause reddens 9
tests across this new layer and both existing Ordo witnesses.
Per-edition agreement: 358/363 (2024-2025), 358/363 (2025-2026),
361/362 (2026-2027).
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