associated element type
Technical computing term; used in contexts such as XML schema or data modeling to refer to a type that is associated with a particular element.
In XML Schema, the associated element type defines the association between an element and a type.
Compound of 結合 (ketsugō, 'association') + 要素 (yōso, 'element') + 型 (kata, 'type'). The exact origin is uncertain; it is a technical term likely coined in computing contexts.