included subelement
Computing term for a subelement that is included or added within a larger structure, such as in XML or data models.
In XML, it is necessary to properly define included subelements.
Compound of 添加 (てんか, 'addition') + 部分 (ぶぶん, 'part') + 要素 (ようそ, 'element'). The exact derivation is uncertain; it is a technical term likely coined in computing contexts.