element type definition
Technical computing term used in XML and markup contexts; refers to a formal declaration of the structure and content model of an element type.
In XML Schema, element type definitions specify the content model of each element.
DTD is a specific older schema language that uses element type definitions, while 要素型定義 is the general concept of defining an element type.
要素宣言 (element declaration) is a closely related term; 要素型定義 focuses on the type definition aspect, often used interchangeably in some contexts.
Compound of 要素 (element), 型 (type), and 定義 (definition), directly corresponding to the English computing term 'element type definition'.