also: ディファクトスタンダード
noun
A standard that is widely adopted in practice, even if not officially sanctioned. Used in business and technology contexts.
このファイル形式は業界のデファクトスタンダードになっている。
This file format has become the de facto standard in the industry.
Spelling with interpuncts; sometimes used for clarity.
Rare variant combining ディ and interpuncts.
デジュリスタンダード (de jure standard) is an officially mandated standard, while デファクトスタンダード is a standard established by widespread use.
Borrowed from English 'de facto standard'.