<valDesc>

<valDesc> (value description) specifies any semantic or syntactic constraint on the value that an attribute may take, additional to the information carried by the datatype element. 22.4.5 Attribute List Specification
組件tagdocs — 22 Documentation Elements
屬性
modespecifies the effect of this declaration on its parent module.
狀態 非必備的
合法的值是:
add
this declaration is added to the current definitions [預設值]
delete
this declaration and all of its children are removed from the current setup
change
this declaration changes the declaration of the same name in the current definition
replace
this declaration replaces the declaration of the same name in the current definition
屬於attDef
可包含
宣告
element valDesc
{
   att.global.attributes,
   attribute mode { "add" | "delete" | "change" | "replace" }?,
   macro.phraseSeq.limited
}
例子
<valDesc>must point to another <gi>align</gi>
element logically preceding this one.</valDesc>