<cond>

<cond> (conditional feature-structure constraint) defines a conditional feature-structure constraint; the consequent and the antecedent are specified as feature structures or feature-structure collections; the constraint is satisfied if both the antecedent and the consequent subsume a given feature structure, or if the antecedent does not. 18.11 Feature System Declaration
組件iso-fs — 18 Feature Structures
屬性
屬於fsConstraints
可包含
iso-fs: f fs then
宣告
element cond { att.global.attributes, ( ( fs | f ), then, ( fs | f ) ) }
註
May contain an antecedent feature structure, an empty <then> element, and a consequent feature structure.