通过单击列出的各种文件类型，您可以查看每一个项。
By clicking various file types listed, you can view the individual items.
是否曾经想过在一个网站地图中提交各种文件类型(视频、图片等)？
Have you ever wanted to submit your various content types (video, images, etc.) in one Sitemap?
此时，文件类型定义(DTD)就能引入各种额外的规则，比如根据文章所推断出的所允许的标记的最小数额限度。
The DTD can then introduce all sorts of additional rules, such as minimization rules that allow markup to be deduced from the context, for example.
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