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--1 Conjunction: Coordination
-- Coordination is defined for many different categories; here is
-- a sample. The rules apply to *lists* of two or more elements,
-- and define two general patterns:
-- - ordinary conjunction: X,...X and X
-- - distributed conjunction: both X,...,X and X
--
--
-- $VP$ conjunctions are not covered here, because their applicability
-- depends on language. Some special cases are defined in
-- [``Extra`` ../abstract/Extra.gf].
abstract Conjunction = Cat ** {
--2 Rules
fun
ConjS : Conj -> [S] -> S ; -- "he walks and she runs"
ConjAP : Conj -> [AP] -> AP ; -- "cold and warm"
ConjNP : Conj -> [NP] -> NP ; -- "she or we"
ConjAdv : Conj -> [Adv] -> Adv ; -- "here or there"
---b DConjS : DConj -> [S] -> S ; -- "either he walks or she runs"
---b DConjAP : DConj -> [AP] -> AP ; -- "both warm and cold"
---b DConjNP : DConj -> [NP] -> NP ; -- "either he or she"
---b DConjAdv : DConj -> [Adv] -> Adv; -- "both here and there"
--2 Categories
-- These categories are only used in this module.
cat
[S]{2} ;
[Adv]{2} ;
[NP]{2} ;
[AP]{2} ;
--2 List constructors
-- The list constructors are derived from the list notation and therefore
-- not given explicitly. But here are their type signatures:
-- BaseC : C -> C -> [C] ; -- for C = S, AP, NP, Adv
-- ConsC : C -> [C] -> [C] ;
}
--.
-- *Note*. This module uses right-recursive lists. If backward
-- compatibility with API 0.9 is needed, use
-- [SeqConjunction SeqConjunction.html].
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