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DocBook 5: The Definitive Guide by Richard L. Hamilton, Norman Walsh

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Name

constant — A programming or system constant

Synopsis

constant ::= (text | phrase db._phrase | replaceable | Graphic inlines | Indexing inlines | Linking inlines | Ubiquitous inlines)*

Attribute synopsis

Common attributes and common linking attributes.

Additional attributes:

  • class (enumeration) = “limit”

Description

A constant identifies a value as immutable. It is most often used to identify system limitations or other defined constants.

Processing expectations

Formatted inline.

Attributes

Common attributes and common linking attributes.

class

Identifies the class of constant

Enumerated values:
“limit”

The value is a limit of some kind.

See Also

command, computeroutput, literal, markup, option, optional, parameter, prompt, replaceable, tag, userinput, varname

Examples

<article xmlns='http://docbook.org/ns/docbook'>
<title>Example constant</title>

<para>In ACL, <constant>main::PCS</constant> contains the path component
separator character.
</para>

</article>
<article xmlns='http://docbook.org/ns/docbook'>
<title>Example constant</title>

<para>The maximum legal length for a pathname is 
<constant class='limit'>PATH_MAX</constant>, defined in
<filename class='headerfile'>limits.h</filename>.
</para>

</article>

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