From d4682c13161b62bc83eaae37790493f670d39c01 Mon Sep 17 00:00:00 2001 From: Lukasz Kasprzak Date: Sat, 22 Aug 2026 12:01:48 +0200 Subject: feat(ef): the Creed, RG 475-476 Whether the Creed is said at Mass. New Rubrics_ef.creed, reached through a new Rite.t.creed field and a new Liturgical_day.t.creed bool (false, not an option, for a rite that has not implemented the rule); colitur rubrics gains a fourth TAB-separated column. 475(a) reads the TEMPORAL cycle's own weekday, not the observed day: a Sunday impeded by a Feast of the Lord (RG 16a) still says the Creed. 475(d)'s three octaves (Nativity, Easter, Pentecost) are pure date/ Easter-offset windows, checked first, since a saint's feast winning the day inside one of them still says the Creed ("etiam in festis occurrentibus") -- St Stephen, 26 December, is the live witness. RG 23 classifies Ash Wednesday and every feria of Holy Week (including the Sacred Triduum) as feriae, not festa, however high their rank, so 475(b)/(c)'s "in festis" never reaches them; this single check subsumes 476(a)'s own naming of the Chrism/Lord's-Supper Mass and the Easter Vigil. RG 28-34 vigils are a third liturgical-day category, also excluded from "in festis" regardless of rank -- reuses the already- exported Precedence_ef.is_vigil rather than a new list. 475(e)'s Apostle/Evangelist natalicia list (creed_apostle_slugs) was derived by grepping data/ef/sanctoral.sexp directly and checking each candidate's own date against whether it is that saint's dies natalis -- not copied from any list supplied with the task. The Conversion of St Paul and the 30 June Commemoration of St Paul are excluded (neither is a natalicium); the Chair of St Peter and St Barnabas are included only because the clause names them explicitly, which is exactly why it has to: neither is a natalicium either. 475(c)'s BVM half reuses Precedence_ef.marian_slugs (newly exported) rather than the subject field alone: checked against the shipped data, almost every Marian sanctoral entry ships subject=Saint, not Bvm. man/colitur.1's rubrics section is updated to match the new column; test/cli.t repinned via dune promote for the same reason. Verified day/readings output byte-identical to v0.10.1 across the whole 1583-9999 domain (both binaries' concatenated day+readings output, 6,148,492 lines each, zero diff). Domain-wide: 882,996 days say the Creed, 2,191,250 do not; every one of the domain's 439,178 Sundays says it, zero exceptions. --- lib/kernel/calendar.ml | 4 + lib/kernel/liturgical_day.ml | 1 + lib/kernel/liturgical_day.mli | 4 + lib/kernel/rite.ml | 1 + lib/kernel/rite.mli | 15 +++ lib/rites/rite_ef/precedence_ef.mli | 16 +++ lib/rites/rite_ef/rite_ef.ml | 4 +- lib/rites/rite_ef/rite_ef.mli | 4 + lib/rites/rite_ef/rubrics_ef.ml | 223 ++++++++++++++++++++++++++++++++++++ lib/rites/rite_ef/rubrics_ef.mli | 37 ++++++ 10 files changed, 308 insertions(+), 1 deletion(-) create mode 100644 lib/rites/rite_ef/rubrics_ef.ml create mode 100644 lib/rites/rite_ef/rubrics_ef.mli (limited to 'lib') diff --git a/lib/kernel/calendar.ml b/lib/kernel/calendar.ml index 7fe9f67..d55e38d 100644 --- a/lib/kernel/calendar.ml +++ b/lib/kernel/calendar.ml @@ -547,6 +547,9 @@ let build_day (rite : ('s, 'r) Rite.t) (idx : 'r Layer.index) rite.Rite.readings ~observed:resolution.Precedence.observed.Precedence.cel ~temporal ~date ~temporal_at:rite.Rite.temporal in + let creed = + rite.Rite.creed ~temporal ~observed:resolution.Precedence.observed.Precedence.cel ~date + in { Liturgical_day.date; rite = rite.Rite.id; @@ -559,6 +562,7 @@ let build_day (rite : ('s, 'r) Rite.t) (idx : 'r Layer.index) omitted; citations; formulary; + creed; } let year (rite : ('s, 'r) Rite.t) (layer : 'r Layer.t) (y : int) : diff --git a/lib/kernel/liturgical_day.ml b/lib/kernel/liturgical_day.ml index 709f878..09ac0a1 100644 --- a/lib/kernel/liturgical_day.ml +++ b/lib/kernel/liturgical_day.ml @@ -26,5 +26,6 @@ type ('s, 'r) t = { formulary : Mass_formulary.t option; (** which Mass the day says, and how that was decided; [None] only for a rite with no lectionary -- see {!Mass_formulary} *) + creed : bool; (** whether the Creed is said at this day's Mass; see {!Rite.t.creed} *) } [@@deriving sexp] diff --git a/lib/kernel/liturgical_day.mli b/lib/kernel/liturgical_day.mli index 4a71d6d..eb45e61 100644 --- a/lib/kernel/liturgical_day.mli +++ b/lib/kernel/liturgical_day.mli @@ -33,5 +33,9 @@ type ('s, 'r) t = { {!Mass_formulary}. [None] only for a rite with no lectionary; for EF it is [Some] on every day of every year 1583..9999, asserted by {!Validate}. *) + creed : bool; + (** Whether the Creed is said at this day's Mass -- {!Rite.t.creed}, + EF: RG 475-476. A decision, not an [option]: [false] for a rite + that has not implemented the rule, same as [creed] itself. *) } [@@deriving sexp] diff --git a/lib/kernel/rite.ml b/lib/kernel/rite.ml index a7d21d3..4999fc2 100644 --- a/lib/kernel/rite.ml +++ b/lib/kernel/rite.ml @@ -18,4 +18,5 @@ type ('s, 'r) t = { date:Date.t -> temporal_at:(Date.t -> ('s, 'r) Temporal.t) -> Mass_formulary.t option * Citation.t list; + creed : temporal:('s, 'r) Temporal.t -> observed:'r Celebration.t -> date:Date.t -> bool; } diff --git a/lib/kernel/rite.mli b/lib/kernel/rite.mli index 45f3ed6..39538d0 100644 --- a/lib/kernel/rite.mli +++ b/lib/kernel/rite.mli @@ -92,4 +92,19 @@ type ('s, 'r) t = { temporal identity (the preceding Sunday's, for the ferial rule) without re-implementing the temporal cycle -- the same shape [transfer_target]'s own [occupant] callback established. *) + creed : temporal:('s, 'r) Temporal.t -> observed:'r Celebration.t -> date:Date.t -> bool; + (** Whether the Creed is said, post-Gospel/homily, at this day's Mass + (EF: RG 475-476). A [bool], not an [option]: this is a decision, + and a rite that has not implemented the rule returns [false] + explicitly rather than leaving the question unanswered. + + [temporal] and [observed] are supplied for the same reason + [readings] gets both: a rubric like this one can turn on either + the day's TEMPORAL-cycle identity (e.g. "is this a Sunday, even + one a feast has displaced") or on the celebration actually + observed, and only the rite knows which. [date] is supplied for + the same reason [readings] gets it too -- a rubric keyed to an + Easter-relative window (e.g. "within the octave of Easter") needs + the civil date and the rite's own Easter to test it, and neither + [temporal] nor [observed] alone carries that arithmetic. *) } diff --git a/lib/rites/rite_ef/precedence_ef.mli b/lib/rites/rite_ef/precedence_ef.mli index 4c2523a..0100d40 100644 --- a/lib/rites/rite_ef/precedence_ef.mli +++ b/lib/rites/rite_ef/precedence_ef.mli @@ -132,6 +132,22 @@ val sunday_marker : string recognising a live candidate again. *) val major_litanies_slug : string +(** RG 112(d)'s own closed, hand-verified list of sanctoral entries that are + themselves a feast/commemoration OF the Blessed Virgin Mary in her own + right -- see the .ml's own citation for the full derivation and the + entries considered and excluded. A celebration is "of the BVM" for + {!disposition}'s RG 112(d) branch when its [subject] is [Subject.Bvm] OR + its slug is on this list ({!Celebration.t}'s [subject] field is NOT + reliably [Bvm] for most Marian sanctoral entries -- bootstrapped from + lectio, most carry [Saint] instead, this list is the reliable signal). + + Exposed (task 5, the Creed, RG 475(c) "festis II classis... B. Mariae + Virg.") so a second rite-local consumer can test the identical + Marian-identity question without re-deriving its own list and risking + drift from this one -- the same reasoning {!vigil_feast_table} and + {!is_vigil} are already exposed for. *) +val marian_slugs : string list + (** [disposition ~winner ~loser]: RG 92-95, 33, 21-27, 94 (docs/research/ rules-register.md §4, "Occurrence", "Vigils" and "Caput IV, 'De feriis'"). What becomes of a losing candidate, decided by the LOSER's diff --git a/lib/rites/rite_ef/rite_ef.ml b/lib/rites/rite_ef/rite_ef.ml index ec6d2b9..e48ff33 100644 --- a/lib/rites/rite_ef/rite_ef.ml +++ b/lib/rites/rite_ef/rite_ef.ml @@ -8,6 +8,7 @@ module Vocab_ef = Vocab_ef module Temporal_ef = Temporal_ef module Precedence_ef = Precedence_ef module Lectionary_ef = Lectionary_ef +module Rubrics_ef = Rubrics_ef open Colitur_kernel @@ -45,4 +46,5 @@ let context ~lectionary ~commons : (Vocab_ef.season, Vocab_ef.rank) Rite.t = vigil_feast = Precedence_ef.vigil_feast }; season_runs = Vocab_ef.seasons; transfer_target = Precedence_ef.transfer_target; - readings = Lectionary_ef.readings ~lectionary ~commons } + readings = Lectionary_ef.readings ~lectionary ~commons; + creed = Rubrics_ef.creed } diff --git a/lib/rites/rite_ef/rite_ef.mli b/lib/rites/rite_ef/rite_ef.mli index 2183799..a4b5d87 100644 --- a/lib/rites/rite_ef/rite_ef.mli +++ b/lib/rites/rite_ef/rite_ef.mli @@ -10,6 +10,7 @@ module Vocab_ef = Vocab_ef module Temporal_ef = Temporal_ef module Precedence_ef = Precedence_ef module Lectionary_ef = Lectionary_ef +module Rubrics_ef = Rubrics_ef (** The EF rite, bundled (design spec's [RITE] signature, realised as a {!Colitur_kernel.Rite.t} value rather than a functor -- see rite.mli): @@ -32,6 +33,9 @@ module Lectionary_ef = Lectionary_ef slug, else (a weekday with no entry of its own) the preceding Sunday's temporal slug, in data/ef/lectionary.sexp. See {!Lectionary_ef.readings} for why the Common is consulted second rather than last. + - [creed]: {!Rubrics_ef.creed}, RG 475-476 -- whether the Creed is said. + The first rubric in this phase governing a part of Mass rather than + occurrence/precedence. Deliberately carries no [sanctoral]/[lectionary] fields the way the original design-doc sketch of [RITE] does: {!Colitur_kernel.Rite.t} (the diff --git a/lib/rites/rite_ef/rubrics_ef.ml b/lib/rites/rite_ef/rubrics_ef.ml new file mode 100644 index 0000000..eef86cb --- /dev/null +++ b/lib/rites/rite_ef/rubrics_ef.ml @@ -0,0 +1,223 @@ +(* RG 475-476 (docs/research/LT.txt, grep "dicitur symbolum"; scan1.txt line + ~3872-3888), quoted here in full so every branch below can cite its own + letter without re-quoting the whole rubric: + + "475. Post Evangelium aut homiliam, dicitur symbolum: + a) in qualibet dominica, etsi eius Officium alicui festo locum + cedat, vel Missa votiva II classis celebretur; + b) in festis I classis et in Missis votivis I classis; + c) in festis II classis Domini et B. Mariae Virg.; + d) per octavas Nativitatis Domini, Paschatis et Pentecostes, etiam + in festis occurrentibus et in Missis votivis; + e) in festis nataliciis Apostolorum et Evangelistarum, necnon in + festis Cathedrae S. Petri et S. Barnabae Ap. + + 476. Non dicitur symbolum: + a) in Missis sive chrismatis sive in Cena Domini, feria V + Hebdomadae sanctae, et in Missa Vigiliae paschalis; + b) in festis II classis, iis exceptis quae supra, n. 475 c et e, + recensentur; + c) in Missis votivis II classis; + d) in Missis festivis et votivis III et IV classis; + e) ratione alicuius commemorationis in Missa occurrentis; + f) in Missis defunctorum." + + SCOPE NOTE, checked once here rather than at every clause below: this + engine resolves ONE observed office and ONE Mass per civil day (see + Rite.t.readings' own doc comment) -- it has no separate "which votive + Mass is said" dimension. So the "vel/et...votivis" halves of 475(a)/(b), + 476(c) entirely, 476(d)'s "et votivis" half, and 476(f) (Requiem Masses, + also not modelled) are genuinely inapplicable to this implementation -- + a documented scope limit, not a defect. 476(e) needs no branch at all: + [creed] below reads only [observed], never a day's admitted + commemorations, so a commemoration can never change its answer by + construction. *) + +open Colitur_kernel + +(* RG 475(e): "in festis nataliciis Apostolorum et Evangelistarum, necnon in + festis Cathedrae S. Petri et S. Barnabae Ap." NATALICIUM means the feast + of the saint's own death (dies natalis) -- not every feast that merely + names him. That is precisely why the clause has to name the Chair of St + Peter and St Barnabas EXPLICITLY: neither is a natalicium (Peter's own is + 29 June, shared with Paul; Barnabas's is his own day, 11 June, but the + clause names him anyway, redundantly with the natalicium reading, rather + than leave it to inference), so neither would be covered without the + explicit "necnon". + + DERIVED, not copied from any list supplied with this task: grepped + data/ef/sanctoral.sexp directly for every entry whose English or Polish + name mentions "Apostle"/"Evangelist"/"Aposto{l/ł}a", then each + candidate's own date, rank and status checked against the calendarium + and against whether it is that saint's own dies natalis. Every entry + below was cross-checked against the shipped data, not assumed: + + andrew (30 Nov, Class2) -- his natalicium. + barnabas (11 June, Class3) -- named explicitly; also his own natalicium. + bartholomew (24 Aug, Class2) -- his natalicium. + chair-of-st-peter (22 Feb, Class2) -- named explicitly ("Cathedrae S. + Petri"); NOT a natalicium (Peter's own is 29 June, shared with Paul) + -- exactly why the clause has to name it. + james-the-greater (25 July, Class2) -- his natalicium. + john-the-evangelist (27 Dec, Class2) -- his natalicium (the one Apostle + traditionally held to have died a natural death; "natalicium" still + names his own feast day, not only a martyr's). + luke-the-evangelist (18 Oct, Class2) -- his natalicium. + mark (25 April, Class2) -- the Evangelist ("Marka Ewangelisty" in the + data's own Polish name); NOT "mark-i" (7 Oct), a different saint (a + Pope), excluded. + matthew (21 Sep, Class2) -- Apostle and Evangelist, his natalicium. + matthias (24 Feb, Class2) -- his natalicium. + sts-peter-paul (29 June, Class1) -- the natalicium of both. + sts-philip-james (11 May, Class2) -- the natalicium of both (James the + Less; there is no separate "james-the-less" entry in the data). + sts-simon-jude (28 Oct, Class2) -- the natalicium of both. + thomas (21 Dec, Class2) -- his natalicium. + + Checked and DELIBERATELY EXCLUDED (the Trap this clause is built around): + conversion-of-st-paul (25 Jan, Class3) -- not a natalicium: it + commemorates an EVENT of his life, not his death. + in-commemoratione-sancti-pauli-apostoli (30 June, Class3, status + Feast, so it CAN be observed, unlike the two entries below) -- a + secondary commemoration of Paul, not his dies natalis (his own is 29 + June, with Peter); its own name says so ("In Commemoratione", not a + feast of his martyrdom). + "peter" (25 Jan) and "paul" (22 Feb) -- both status + [Commemoration_only] (RG 110's own Peter/Paul companions, on the + Conversion and Chair days respectively: {!Precedence_ef.disposition}'s + own citation), so neither can ever be [observed]; moot either way, + but neither is a natalicium regardless. + mark-i (7 Oct) -- a different saint (Pope St Mark), not the + Evangelist. *) +let creed_apostle_slugs = + [ "andrew"; "barnabas"; "bartholomew"; "chair-of-st-peter"; "james-the-greater"; + "john-the-evangelist"; "luke-the-evangelist"; "mark"; "matthew"; "matthias"; + "sts-peter-paul"; "sts-philip-james"; "sts-simon-jude"; "thomas" ] + +let creed ~(temporal : (Vocab_ef.season, Vocab_ef.rank) Temporal.t) + ~(observed : Vocab_ef.rank Celebration.t) ~(date : Date.t) : bool = + let easter = Computus.gregorian_easter (Date.year date) in + let n = Date.to_rata date - Date.to_rata easter in + let m = Date.month date and dd = Date.day date in + let slug = Slug.to_string observed.Celebration.slug in + if + (* RG 475(d): "per octavas Nativitatis Domini, Paschatis et + Pentecostes, etiam in festis occurrentibus et in Missis votivis" -- + an unconditional window override, checked first: EVEN a saint's + feast that wins the day within one of the three octaves (St Stephen, + 26 December, is the live witness -- RG 67's own "Com. octavae + Nativitatis" note, quoted in full in temporal_ef.ml's [named]) still + says the Creed. Pure date/Easter-offset arithmetic, not season or + rank: Ascension (Easter+39) and the Pentecost Vigil (Easter+48) are + both [Class1] and both fall inside the Paschaltide SEASON but + outside either 8-day OCTAVE, so a rank- or season-based test here + would wrongly include them -- checked and rejected for exactly this + reason. + + Nativity: 25-31 December (its own day plus 7) + 1 January (RG 91 + entry 5's own "Octave Day of the Nativity", the identical table + entry as 24 December's vigil -- temporal_ef.ml's [named]). Easter: + Easter Sunday (offset 0) through Low Sunday (offset 7) -- RG 11's + own "dominicae Paschatis et Pentecostes sunt pariter festa I classis + CUM OCTAVA". Pentecost: Pentecost (offset 49) through Trinity Sunday + (offset 56), the RG 91-entry-14-adjacent "octave day" Trinity Sunday + itself names in temporal_ef.ml. *) + (m = 12 && dd >= 25 && dd <= 31) + || (m = 1 && dd = 1) + || (n >= 0 && n <= 7) + || (n >= 49 && n <= 56) + then true + else if + (* RG 475(a): "in qualibet dominica, ETSI EIUS OFFICIUM ALICUI FESTO + LOCUM CEDAT" -- the Creed is said on any Sunday even when a feast + displaces the Sunday's own office (RG 16(a): a Feast of the Lord I + or II class occurring on a II-class Sunday takes its place "cum + omnibus iuribus et privilegiis"). Read off [temporal]'s own weekday + -- the day's calendar fact, independent of whatever [observed] turns + out to be -- never off [observed]'s slug or rank, which is exactly + what would go silently wrong the day such an impeding feast wins: + see {!Colitur_kernel.Precedence.rules.admit}'s own [~temporal] + parameter (precedence.mli) for the identical argument, made there + for RG 111(b) rather than RG 475(a). *) + temporal.Temporal.weekday = Date.Sun + then true + else if + (* RG 23 (Caput IV, "De Feriis"): "Feriae I classis sunt: a) feria IV + cinerum; b) omnes feriae Hebdomadae sanctae." Ash Wednesday and every + feria of Holy Week (Monday through Saturday -- RG 91 entry 2's + Sacred Triduum, Thursday-Saturday, is a THIRD sub-case of this same + "feria", not a "festum": RG 35, immediately below in Caput VI, + defines "festum" as a distinct liturgical-day category from "feria", + RG 21-27) are FERIAE, never FESTA, however high their RG 91 rank -- + so 475(b)/(c)'s "in festis" never reaches them, regardless of rank. + + This single structural check subsumes 476(a)'s own explicit naming + of the Chrism Mass, the Mass of the Lord's Supper (both Holy + Thursday) and the Easter Vigil Mass (Holy Saturday's date): both are + already excluded here as Holy Week feriae, so 476(a) needs no + separate branch. (Good Friday needs no rubric at all -- RG 28's own + closing sentence on the Paschal Vigil aside, Good Friday's own + liturgical action has no Mass in the 1955-restored Holy Week to + begin with, so the question is moot there independent of this + check -- but this structural test correctly excludes it too, since + it is also named in RG 23(b).) *) + n = -46 || (n >= -6 && n <= -1) + then false + else if + (* RG 28-34 (Caput V, "De Vigiliis"): a vigil is its OWN liturgical-day + category, distinct from "festum" (RG 35, Caput VI) the same way a + feria is (immediately above) -- so 475(b)/(c)'s "in festis" does not + reach a vigil either, regardless of its own RG 91 rank. This is also + why 476(a) has to name the Easter Vigil explicitly: RG 28's own + closing sentence says the Paschal Vigil, uniquely, "non sit dies + liturgicus" [is not a liturgical day] at all, so it is not even a + "vigilia" in RG 29-32's numbered sense -- nothing else in this + taxonomy would have excluded it without that explicit clause, unlike + every OTHER vigil, which is excluded merely by being one. + {!Precedence_ef.is_vigil} already tests both slug conventions this + codebase's data uses (the temporal cycle's "-vigil" suffix and the + sanctoral bootstrap's "vigil-of-" prefix) for the identical RG 33 + question; reused here rather than re-derived, on the same footing as + {!Precedence_ef.marian_slugs} just below. *) + Precedence_ef.is_vigil slug + then false + else if + (* RG 475(b): "in festis I classis". Genuine feasts only, by + construction of the two exclusions immediately above (feriae, + vigils) -- every remaining [Class1] candidate reaching this branch + is a real festum: the Nativity, Epiphany, Ascension, Corpus Christi, + the Sacred Heart, Christ the King, a I-class sanctoral feast (the + Assumption, the Immaculate Conception...), or a I-class Sunday + (already [true] above via 475(a), so this branch is never the FIRST + to grant those a [true], only ever redundant with it). *) + observed.Celebration.rank = Vocab_ef.Class1 + then true + else if + (* RG 475(c): "in festis II classis Domini et B. Mariae Virg." -- + [subject = Lord] is reliably set on genuine II-class sanctoral + feasts of the Lord (Exaltation of the Holy Cross, the Purification, + the Transfiguration, the Commemoration of the Baptism of the Lord, + the Dedication of the Lateran Archbasilica -- checked directly + against data/ef/sanctoral.sexp: six [subject = Lord] entries ship, + none a vigil or feria) and on the two temporal-cycle Class2 Lord + feasts (Holy Family, Holy Name of Jesus). [subject = Bvm], by + contrast, is NOT reliable for the BVM half: checked directly against + the data, almost every Marian sanctoral entry (the Assumption, the + Annunciation, the Immaculate Heart, the Nativity of the BVM...) + ships [subject = Saint] instead -- {!Precedence_ef.marian_slugs} is + the list built (and, here, reused rather than re-derived) precisely + because the [subject] field cannot be trusted alone for this + question; see its own citation in precedence_ef.mli. *) + observed.Celebration.rank = Vocab_ef.Class2 + && (observed.Celebration.subject = Subject.Lord + || observed.Celebration.subject = Subject.Bvm + || List.mem slug Precedence_ef.marian_slugs) + then true + else + (* RG 475(e): see {!creed_apostle_slugs}'s own citation. Checked last + and without a rank guard, on purpose -- Barnabas is only [Class3] + and the Chair of St Peter's own [subject] is [Saint], so neither + would ever be reached by the two branches above; every [Class1] + entry on the list (Sts Peter & Paul) is already [true] via 475(b), + so this branch is redundant, never wrong, for those. *) + List.mem slug creed_apostle_slugs diff --git a/lib/rites/rite_ef/rubrics_ef.mli b/lib/rites/rite_ef/rubrics_ef.mli new file mode 100644 index 0000000..16e7491 --- /dev/null +++ b/lib/rites/rite_ef/rubrics_ef.mli @@ -0,0 +1,37 @@ +(** RG 475-476 (docs/research/LT.txt, grep "dicitur symbolum") -- whether the + Creed is said at Mass. The first rubric in this phase governing a PART OF + MASS rather than occurrence/precedence, hence its own module: see the + .ml's own header for the rubric quoted in full and every branch's + citation. *) + +open Colitur_kernel + +(** RG 475(e)'s "festis nataliciis Apostolorum et Evangelistarum, necnon in + festis Cathedrae S. Petri et S. Barnabae Ap." -- see the .ml's own + citation for how each entry was derived from and verified against + data/ef/sanctoral.sexp, and for what was deliberately excluded. Exposed + so the test suite can assert completeness against the shipped data the + same way {!Precedence_ef.vigil_feast_table} already lets it. *) +val creed_apostle_slugs : string list + +(** Whether the Creed is said, post-Gospel/homily, at the Mass this day + resolves to. + + [temporal] is read for exactly one fact -- RG 475(a)'s own "in qualibet + dominica, ETSI EIUS OFFICIUM ALICUI FESTO LOCUM CEDAT" ("on any Sunday, + EVEN WHEN a feast displaces its own Office"): a Sunday impeded by a + Feast of the Lord (RG 16(a)) still says the Creed, so this reads the + TEMPORAL cycle's own weekday, never [observed]'s. Every other clause + reads [observed] -- the celebration whose Mass is actually said -- and + [date], read once against the rite's own (Gregorian) Easter for the two + Easter-relative window questions (RG 475(d)'s three octaves, RG 23's + Ash-Wednesday-and-Holy-Week feriae). [creed] never reads + {!Liturgical_day.t.commemorations}: RG 476(e), "ratione alicuius + commemorationis in Missa occurrentis" [never say the Creed merely + because of a commemoration], holds by construction rather than by a + checked branch. *) +val creed : + temporal:(Vocab_ef.season, Vocab_ef.rank) Temporal.t -> + observed:Vocab_ef.rank Celebration.t -> + date:Date.t -> + bool -- cgit v1.3