文書 ぶんしょ がた宣言 せんげん部分 ぶぶん集合 しゅうごうであれば
bunshogata sengembubunshūgōdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 文書型宣言部分集合

1. If it is a document-type declaration subset; If it’s a subset of the document-type declaration.

Ba Conditional
Computing