<iff>

<iff> (if and only if) separates the condition from the consequence in a bicond element. 18.11 Feature System Declaration
組件iso-fs — 18 Feature Structures
屬性
屬於bicond
可包含空白元素
宣告
element iff { att.global.attributes, empty }
This element is provided primarily to enhance the human readability of the feature-system declaration.