| DocBook: The Definitive Guide 2.0.17 (Alpha)

# keyword

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keyword — One of a set of keywords describing the content of a document

## Synopsis

### Mixed Content Model

    keyword ::=
    (#PCDATA)

### Attributes

Common attributes

## Description

A `Keyword` is a term describing the content of a document. The keyword applies to the document component that contains it.

### Processing expectations

Keywords are rarely displayed to a reader. Usually, they are reserved for searching and retrieval purposes. If they are displayed, they may be displayed either inline or as a displayed block, depending on context.

Unlike `SubjectTerm`s, which should be drawn from a controlled vocabulary, keywords may be chosen freely.

### Parents

These elements contain keyword: `keywordset`.

## See Also

`keywordset`, `subject`, `subjectset`, `subjectterm`.

## Examples

For examples, see `chapter`.

keysym |  | keywordset

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