noun
base document type
Computing term for a fundamental document type definition, often in the context of XML or SGML.
XMLでは、基本文書型を定義することで文書の構造を決める。
In XML, you define the document structure by specifying a base document type.
Compound of 基本 (basic) + 文書 (document) + 型 (type). A technical term likely calqued from English 'base document type'.