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(** RG 91's Table of Precedence for the EF (1962) rite: ranks any candidate
for a given day by its RG 91 entry number. See
docs/research/rules-register.md §4, whose 28-entry transcription this
module follows line by line. *)
open Colitur_kernel
(** The universal (base) sanctoral layer's {!Celebration.t}.layer id. A
Sanctoral-origin candidate whose layer is anything else is an overlay:
"proper" (RG 91 entries 12, 19, 23) unless its layer id also carries
{!indult_prefix} ("indult", entries 13, 20). This id and the prefix are
colitur's own data-modelling convention, not an RG citation -- RG 91
prescribes the ranking, not a machine encoding for it. Whichever task
loads the real EF sanctoral base layer and its overlays must either
reuse these two constants or this classifier will misfile them. *)
val universal_layer : string
(** See {!universal_layer}. *)
val indult_prefix : string
(** Returned for a candidate shape RG 91's 28-entry table has no row for --
e.g. a [Class1] vigil that is not the Nativity or Pentecost (entries 5,
9 are the only I-class vigils the table names), or a [Class4] candidate
also marked as a vigil. Deliberately outside 1..28 and larger than any
real entry, so an unclassified candidate can never win an occurrence
contest by accident; a caller that sees it back knows the shape needs a
new rule, not a silently wrong one. *)
val unclassified : int
(** [band ctx c]: RG 91's Table of Precedence. Returns the table's own entry
number -- I class 1-13, II class 14-21, III class 22-26, IV class 27-28;
lower wins (see {!Precedence.rules.band}). Total over every candidate
{!Precedence.resolve} or {!Calendar} can construct, including shapes the
1962 table itself does not describe (see {!unclassified}). *)
val band : Vocab_ef.season Precedence.context -> Vocab_ef.rank Precedence.candidate -> int
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