This Physical formatting element applies underlining to text.
This was a proposed element in early HTML 2 drafts but did not make it
to the final specification. It was included however in the subsequent HTML
DTD Note: The underline element was considered a
"Proposed Element" in some early versions of the 2.0 DTD, but
was not listed in the final 2.0 DTD specification at all. It has since
re-appeared in later drafts and specifications.
This element is gaining wide support and has become fairly safe to
use when authoring.
As mentioned below, use of this element can possibly generate
confusion with hyperlinks which generally carry a characteristic
Netscape's browsers were notable for not supporting this element
until the v3.0 Beta 5 release. A probable reason for the omission
could have been to restrict confusion with the characteristic underlining