identifies the datatype of an attribute value, either by referencing an item in an externally defined datatype library, or by pointing to a TEI-defined data specification 外部で定義されたデータ型ライブラリ内の項目を参照するか、もしくはTEIにより定義されたデータ仕様を指し示すことで、属性値のデータ型を識別する Data facets can only be specified for references to datatypes specified by XML Schema Part 2: Datatypes Second Edition — that is, for there to be a 'dataFacet' child there must be a @name attribute. Data facets and restrictions cannot both be expressed on the same data reference — that is, the @restriction attribute cannot be used when a 'dataFacet' element is present. Restrictions can only be specified for references to datatypes specified by XML Schema Part 2: Datatypes Second Edition — that is, for there to be a @restriction attribute there must be a @name attribute, too. the identifier used for this datatype specification このデータ型仕様に使われる識別子 the name of a datatype in the list provided by XML Schema Part 2: Datatypes Second Edition XML Schemas: Part 2: Datatypesで提供されているリスト内のデータ型の名前 a pointer to a datatype defined in some datatype library あるデータ型ライブラリ内で定義されたデータ型へのポインタ supplies a string representing a regular expression providing additional constraints on the strings used to represent values of this datatype このデータ型の値を表すために使用される文字列に追加の制約を加える正規表現を表す文字列を提供する datatype used for attributes taking an integer value between 0 and 99

Only one of the attributes key, name, and ref may be used on any given instance of dataRef.

Neither a restriction attribute nor a dataFacet child element may be used unless the dataRef refers to a datatype from the specification XML Schema Part 2: Datatypes Second Edition with a name attribute.

key, name, refの内どれか一つの属性のみを使用することができる