便宜上

Meanings

1. Adverb

   for convenience; as a matter of convenience

• 普通ふつうは、id属性ぞくせいとname属性ぞくせいに同おなじ値あたいを割わり当あてます。（訳注やくちゅう：異ことなっていても構かまわないが便宜上べんぎじょう同おなじ値あたいを割わり当あてるという事こと）

  Usually the id and name attributes have the same value applied. (N.B. Not because it matters if they differ but just as a matter of convenience.)