7.9. Element head

7.9. Element `head`

Specifies the content of the html:head element of an output HTML page.

By default, this html:head element is simply a copy of the html:head element found in the content “pulled” using the href attribute of a book division. But when a head child element of a book division is specified,

Its title child element is used to specify the html:title of the output HTML page.
All its other child elements and also all its XHTML5 global attributes are copied to the html:head of the output HTML page.

Content model

(title? , 
 (html:base | html:link | html:meta | html:script | html:style | 
  html:template)*)

Attributes

Name	Data type	Default value
`override`	`boolean`	Specified by attribute `headoverridedefault` of element `book`.
`xml:base`	`anyURI`
`xml:id`	`ID`
`xml:lang`	`language` or "" (the empty string)	.

Other attributes: XHTML5 global attributes, including any attribute having a name starting with "data-".

override: When set to true, the child elements and XHTML5 global attributes found in the head element completely replace the child elements and XHTML5 global attributes found in the html:head element of an input HTML page.
When set to false, the child elements and XHTML5 global attributes found in the head element are merged with the child elements and XHTML5 global attributes found in the html:head element of an input HTML page.

Parents

The following elements contain head: appendices, appendix, book, chapter, part, section.

Children

The following elements occur in head: html:base, html:link, html:meta, html:script, html:style, html:template, title.

Example

Element head is most often used to give a “rich” title to a book division.

<appendix href="ssh_key.html">
  <head>
    <title>Generating Your <html:b>SSH</html:b> Public Key</title>

    <html:style>
.error {
    font-weight: bold;
    font-style: italic;
    color: #800000;
}
    </html:style>
  </head>
</appendix>