proper subelement
Technical computing term for a subelement that is correctly or properly defined within a larger structure, such as in XML or data modeling.
In an XML document, proper subelements must be correctly defined.
Compound of 真 (しん, 'true' or 'proper') + の (possessive particle) + 部分 (ぶぶん, 'part') + 要素 (ようそ, 'element'). A technical term likely coined in computing contexts.