last modification date

Currency: The date that content was first developed and the date of last update or modification should be clearly indicated on each piece.

时效性：在每一部分内容中，应清楚地标明首次发表的日期以及后续更新或修改的日期。

The metadata cache contains the full path names of directories and files as keys and metadata ( e.g.file length, last modification date, and whether the key is a file or a directory) as values.

元数据缓存器将目录和文件的路径名称保存为键，将元数据保存为值（如文件长度、最后修改时间、标记该条目是文件还是目录等）。

A new column indicates the last modification date.

一个新列会指示最后的编辑日期。

A preview now shows three columns with subject, number, and last modification date.

预览现在显示三列，它们是主题、数量和最后一次修改日期。

Optionally, you can list additional information for each URL, including its last modification date, its change frequency, an expiration date, and a priority value.

您可以选择性地为每个URL列出额外的信息，包括URL的最后修改时间、更改频率、终止日期和优先值。

Most sitemap creators are web-based, and they request the URL of the website along with a few parameters such as change frequency and last modification date.

大多数站点地图创建器是基于web的，它们利用一些参数（比如说更改频率和最新修改日期）请求web站点的URL。