The <header> tag generates the document header and is a prerequisite of any Z document, along with the title tags.

Look at the top of the page. The big text that says <header> is a result of a header tag.

<header>Header text</header>

Related tags:
 - title

The Z Language Handbook 1.0, Copyright (c) David Hanefelt Kristensen.
Licensed under the GNU Free Documentation License