文書 ぶんしょ がた宣言 せんげん部分 ぶぶん集合 しゅうごうじゃなかったです
bunshogata sengembubunshūgōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 文書型宣言部分集合

1. Wasn't a document-type declaration subset.; Wasn't a set of document-type declarations.

Past/Perfective
Negative
Polite
Casual Register
Computing