Users can rate a content item on a scale of 1 to 5 or, if they prefer, they can enter a comment instead of or in addition to the rating.

用户可以对内容项进行评价（评级可以从 1 到 5），如果愿意的话，他们也可以输入评论来代替评级，或者既添加评级又添加评论。

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You can display the Comment menu either by using the drop-down tool item on the sidebar toolbar or by using a right mouse click within the sidebar.

您可以使用工具栏上的下拉工具项，或者在工具条上右击，来显示Comment菜单。

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For example, you could specify that the title property must be a string or that a comment item must have author, created, and content properties.

例如，可以指定title属性必须是字符串或指定一个评论项必须有author、created以及content属性。

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So if you are a purchaser looking at an online site, you could purchase or comment on an item (or not).

FORBES: Modeling Enterprise Social Business Processes