<hr>, this is an empty element. That is, there must be no end-tag. It is simply inserted anywhere in a piece of text to effect a line break.
The essence of this tag is that it forces a line break in
a context where one would not ordinarily occur. Note that <br>
causes a jump to the next line; it does not cause an empty line
to be inserted. Note that
<br> causes a jump to the
next line, not the insertion of an empty line.
One of the most common uses is in an address element, which like
blockquote, "collapses" all whitespace, including newlines.
Thus an address like
<address> Conservation Lab Stanford University Libraries Stanford, CA 94305 </address>
is renderedConservation Lab Stanford University Libraries Stanford, CA 94305
In order to get the desired linebreaks, we simply instert
<br> at the end of each line but the last:
<address><br> Conservation Lab<br> Stanford University Libraries<br> Stanford, CA 94305<br> </address>
which is renderedConservation Lab