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(* The Tabula dierum liturgicorum secundum ordinem praecedentiae disposita
(Missale Romanum, editio typica tertia 2002; "Normae universales de anno
liturgico et de calendario", printed immediately before it) -- 13 numbered
entries in three parts. This module transcribes it, one [band] branch per
entry, the same discipline Rite_ef.Precedence_ef applies to RG 91's 28.
CITATION DISCIPLINE: the 2002 Missal PDF carries BOTH the Normae universales
AND the Institutio Generalis Missalis Romani, each independently numbered
from 1. Every citation below therefore names its document: "Normae n. N" or
"IGMR n. N". A bare "n. N" is ambiguous and must not appear.
ENTRY VALUES ARE THE TABLE'S OWN NUMBER TIMES TEN (entry 1 -> 10, entry 13
-> 130). Identical to Precedence_ef's own convention and adopted for the
identical reason: a future sub-rank (a movable/fixed split of one row, the
shape RG 91 entry 14 forced on the EF side) becomes an ordinary position
BETWEEN neighbours, with no rescale of every other branch. Do NOT express a
sub-rank as a negative sentinel: Precedence_ef's own history records that as
a defect, because a negative value avoids collision but inverts ORDERING. *)
open Colitur_kernel
let unclassified = max_int
(* Not a Normae citation. The Tabula distinguishes universal-calendar entries
(3, 7, 10) from proper-calendar ones (4, 8, 11), and nothing in
Celebration.t marks that distinction except [layer]. Same mechanism, and
same naming, as Precedence_ef.{universal_layer,indult_prefix}.
[universal_layer] itself is exported (hand-authored sanctoral data is
tagged with it) but [band] no longer tests [layer = universal_layer]
directly anywhere in this chain: every temporal-origin candidate
{!Rite_of.Temporal_of.temporal} constructs carries [layer = "temporal"]
unconditionally (temporal_of.ml, [build]'s own hardcoded ~layer), never
[universal_layer] -- so a positive "is this the universal layer" test
would silently exclude Trinity Sunday, Corpus Christi, Christ the King,
Mary Mother of God, Holy Family and the Baptism of the Lord, none of
which are proper-calendar in the sense the Tabula's own 4/8/11 mean.
Entries 3, 5 and 7 (all universal-or-temporal, never proper) therefore
test [not (is_proper layer)] instead -- true for both [universal_layer]
and ["temporal"], false only for a genuine ["proper:..."] candidate. Only
entries 4 and 8 test [is_proper] itself. *)
let universal_layer = "of-universal"
let proper_prefix = "proper:"
let is_proper layer = String.starts_with ~prefix:proper_prefix layer
(* Days measured from Easter, so the Triduum and the Easter Octave are
identified STRUCTURALLY rather than by slug. Temporal_of emits Good Friday
and Holy Saturday as ordinary Lent week-6 ferias
("of-lent-6-friday"/"of-lent-6-saturday"), so there is no slug to key on --
the same situation Precedence_ef.band faces for RG 91 entry 2, resolved the
same way. *)
let easter_offset (ctx : Vocab_of.season Precedence.context) =
let y = Date.year ctx.date in
Date.to_rata ctx.date - Date.to_rata (Computus.gregorian_easter y)
let slug_of (c : Vocab_of.rank Precedence.candidate) = Slug.to_string c.cel.slug
(* Tabula I.1: "Triduum paschale Passionis et Resurrectionis Domini."
HOLY THURSDAY IS DELIBERATELY NOT HERE. The Tabula's own entry 2 reads
"Feriae Hebdomadae sanctae, a feria II ad feriam V inclusive" -- Monday
through THURSDAY inclusive -- and the Paschal Triduum begins with the
evening Mass of the Lord's Supper, an event INSIDE Holy Thursday's civil
day. At colitur's civil-day granularity (one office per date, never a
sub-day boundary) the day itself therefore stays with the Holy Week ferias
at entry 2. This is the SAME granularity decision, on the precedence axis,
that data/of/expected-divergences-litcal.sexp's own L1 records on the season
axis (Normae nn. 28/30) -- one decision with two visible consequences, not
two independent judgements. *)
let is_triduum ctx = List.mem (easter_offset ctx) [ -2; -1; 0 ]
(* Tabula I.2, five clauses in one entry. *)
let entry_2_named =
[ "of-nativity"; "of-epiphany"; "of-ascension"; "of-pentecost"; "of-ash-wednesday" ]
let is_privileged_sunday (ctx : Vocab_of.season Precedence.context) c =
ctx.weekday = Date.Sun
&& (match ctx.season with
| Vocab_of.Advent | Vocab_of.Lent | Vocab_of.Easter -> true
| Vocab_of.Christmas | Vocab_of.Ordinary_time -> false)
&& c.Precedence.origin = Precedence.Temporal
(* "Feriae Hebdomadae sanctae, a feria II ad feriam V inclusive": Easter-6
(Monday) through Easter-3 (Thursday). Palm Sunday (Easter-7) is a Sunday of
Lent, covered by [is_privileged_sunday] in the same entry. *)
let is_holy_week_feria ctx = List.mem (easter_offset ctx) [ -6; -5; -4; -3 ]
(* "Dies infra octavam Paschae": Easter+1 .. Easter+7. Easter Sunday itself is
entry 1. *)
let is_easter_octave_day ctx =
let o = easter_offset ctx in
o >= 1 && o <= 7
(* Tabula II.6: "Dominicae temporis Nativitatis et dominicae 'per annum'".
The privileged Sundays (Advent, Lent, Easter) are entry 2 and are tested
first, so this branch sees only the remaining two seasons. *)
let is_ordinary_sunday (ctx : Vocab_of.season Precedence.context) c =
ctx.weekday = Date.Sun
&& (match ctx.season with
| Vocab_of.Christmas | Vocab_of.Ordinary_time -> true
| Vocab_of.Advent | Vocab_of.Lent | Vocab_of.Easter -> false)
&& c.Precedence.origin = Precedence.Temporal
(* Tabula II.9, three clauses. "Feriae Adventus a die 17 ad 24 decembris
inclusive" -- the late-Advent ferias, which outrank an obligatory memorial
where an ordinary Advent feria (entry 13) does not. *)
let is_late_advent_feria (ctx : Vocab_of.season Precedence.context) =
ctx.season = Vocab_of.Advent
&& Date.month ctx.date = 12
&& Date.day ctx.date >= 17
&& Date.day ctx.date <= 24
(* "Dies infra octavam Nativitatis": 26-31 December. The Nativity itself
(25 December) is entry 2; 1 January is the Octave Day, a solemnity in the
sanctoral, not a feria. *)
let is_nativity_octave_day (ctx : Vocab_of.season Precedence.context) =
Date.month ctx.date = 12 && Date.day ctx.date >= 26 && Date.day ctx.date <= 31
(* "Feriae Quadragesimae". Ash Wednesday and the Holy Week ferias are entry 2
and are tested first. *)
let is_lenten_feria (ctx : Vocab_of.season Precedence.context) =
ctx.season = Vocab_of.Lent
let band (ctx : Vocab_of.season Precedence.context)
(c : Vocab_of.rank Precedence.candidate) : int =
let temporal = c.Precedence.origin = Precedence.Temporal in
let layer = c.cel.layer in
if temporal && is_triduum ctx then 10 (* Tabula I.1 *)
else if
temporal
&& (List.mem (slug_of c) entry_2_named
|| is_privileged_sunday ctx c
|| is_holy_week_feria ctx
|| is_easter_octave_day ctx)
then 20 (* Tabula I.2 *)
else if c.cel.rank = Vocab_of.Sollemnitas && not (is_proper layer) then
30 (* Tabula I.3 -- universal or temporal-origin, never proper; see the
[is_proper] comment above for why this is not [is_universal] *)
else if c.cel.rank = Vocab_of.Sollemnitas && is_proper layer then
40 (* Tabula I.4 *)
else if c.cel.rank = Vocab_of.Festum && c.cel.subject = Subject.Lord
&& not (is_proper layer) then 50 (* Tabula II.5 *)
else if is_ordinary_sunday ctx c then 60 (* Tabula II.6 *)
else if c.cel.rank = Vocab_of.Festum && not (is_proper layer) then
70 (* Tabula II.7 -- BVM and saints; entry 5 already took subject = Lord *)
else if c.cel.rank = Vocab_of.Festum && is_proper layer then
80 (* Tabula II.8 *)
else if
temporal
&& (is_late_advent_feria ctx || is_nativity_octave_day ctx || is_lenten_feria ctx)
then 90 (* Tabula II.9 *)
else if c.cel.rank = Vocab_of.Memoria_obligatoria && not (is_proper layer) then
100 (* Tabula III.10 -- universal or temporal-origin, never proper; see the
[is_proper] comment above for why this is not [is_universal] *)
else if c.cel.rank = Vocab_of.Memoria_obligatoria && is_proper layer then
110 (* Tabula III.11 *)
else if c.cel.rank = Vocab_of.Memoria_ad_libitum then
(* Tabula III.12. ONE undivided row: unlike entries 10/11 (and 3/4, 7/8),
the Tabula draws no universal/proper split for optional memorials, so
[layer] is deliberately not read here. The asymmetry is the source's. *)
120
else if temporal && c.cel.rank = Vocab_of.Feria then
(* Tabula III.13, four clauses -- ordinary Advent ferias to 16 December,
Christmas-time ferias from 2 January, paschal ferias after the Octave,
and ferias "per annum". Every privileged feria (entries 2 and 9) is
tested earlier in this chain, so what reaches here is exactly the
residue those four clauses name, and no clause needs its own date
arithmetic. *)
130
else unclassified
(* Normae n. 60: "Attamen sollemnitas, quae impeditur a die liturgico, qui
praecedentia gaudeat, ad proximiorem diem transferatur... Reliquae
celebrationes eo anno omittuntur." An impeded SOLEMNITY is transferred;
every other losing celebration is simply omitted for that year.
[Commemorate] IS NEVER RETURNED, AND THAT IS THE RULE, NOT A GAP. The OF
has no commemoration of a losing celebration in the EF's sense at all --
contrast RG 108-111, which the EF module implements at length. An optional
memorial (Tabula III.12) is an ELECTION the celebrant may make, not a
commemoration attached to another day's office, and must not be modelled as
one: doing so would put a celebration in Liturgical_day.commemorations that
no rubric ever puts there. Design 2026-08-24 §3 ("What will not survive
contact") predicted exactly this; this function is where the prediction is
kept.
[Repose] is likewise never returned. It is EF vocabulary that the EF module
itself emits from nothing.
[winner] is deliberately unread. n. 60 keys the loser's fate on the LOSER's
own grade alone -- unlike the EF's RG 92-95, where the winner's class
decides whether a commemoration survives. Kept in the signature because
Precedence.rules.disposition requires it, and a future proper-calendar rule
might read it. *)
let disposition ~(winner : Vocab_of.rank Precedence.candidate)
~(loser : Vocab_of.rank Precedence.candidate) : Precedence.disposition =
ignore winner;
match loser.cel.rank with
| Vocab_of.Sollemnitas -> Precedence.Transfer
| Vocab_of.Festum | Vocab_of.Memoria_obligatoria | Vocab_of.Memoria_ad_libitum
| Vocab_of.Feria ->
Precedence.Omit
|
