这样的字段属于类型，不属于类型的实例。

It belongs to the type, not to instances of the type.

youdao

DITA文章通常都使用这三种信息类型编辑，或者对不属于任何大类的信息使用更加一般的topic类型。

DITA articles are usually authored using these three information types, or using a more generic topic type for information that does not fit any of the main categories.

youdao

你旅行时会碰到这种类型的人，他不属于任何地方，没有根，没有家庭和朋友。

He was the type you sometimes meet while travelling, a citizen of nowhere, with no roots, family or friends.

youdao