4.2.1. Distinguish links from the surrounding text
When links are included in content, they must be distinguished from the text surrounding them. For example, the links could be underlined.
Note
This rule does not apply to links included in link groups (menu items, for example), because their function is obvious.
Warning
You are strongly advised not to:
Tip
In addition to this recommendation it is also a good idea to provide the mouse-over appearance of links in the mock-ups.
Example
example of a satisfactory visual distinction between a link and its surrounding text.