文書 ぶんしょ がた宣言 せんげん部分 ぶぶん集合 しゅうごうだったら
bunshogata sengembubunshūgōdattara

Noun
Da Copula

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

1. If it's a document-type declaration subset; If it were a document-type declaration subset

Tara Conditional
Computing