The basic structure of an HTML document
always
consists of a head and a body.
It is not necessary to explicitly enclose the head into a HEAD
element.
Typical rendering
Using an explicit HEAD element does not affect the document rendering.
Basic syntax
<HEAD> TITLE element
</HEAD>
Both the start and end tags can be omitted.
Possible attributes
None.
Allowed context
The HTML element, which can be either implicit or explicit.
Only one HEAD element is allowed in a document, and it must
appear before the document body
(which can be implicit or explicit).
Contents
Exactly one TITLE element, and optionally
(in any order)
<HEAD>
<TITLE>Getting started with Perl</TITLE>
</HEAD>
Notes
The explicit use of a HEAD element has no other effect than
making it explicit (to the reader of the HTML code)
which part of the document belongs to the
head section.