You can specify custom Metadata on every file. Any user Metadata is a key value pair.

每个文件都可以附加一些由你指定的元数据。

youdao

It indexes all the content and user metadata to produce better rankings and refreshes indexes hourly.

它对所有的内容和用户的元数据进行索引来得到更好的排名，并每小时刷新索引。

youdao

The keyword search can be executed on different parameters such as document type, categories, user, and custom metadata defined through the property sheet.

关键词搜索可在不同的参数(比如文档类型、类别、用户和通过属性表定义的定制元数据)上执行。

youdao

New titles are indexed by analyzing user reviews and metadata, using innovative Natural Language Processing technology.

ENGADGET: Jinni Taste Engine for TV and movies envisioned as a Google TV app

Adding a comprehensive search feature that uses metadata in addition to user-defined tags, searching "Photos from Thanksgiving" pulls relevant images even if they didn't have those words in the post.

ENGADGET: Path 2.9 update introduces contextualized, personalized search (update: now with video)

Metadata is, in fact, the elixer of successful user experience.

FORBES: With All Content Moving Mobile, Karen McGrane Writes, The API's The Thing