constant

constant — A programming or system constant

Synopsis

Mixed Content Model

constant ::=
(#PCDATA|replaceable|inlinegraphic|inlinemediaobject|indexterm|
 beginpage)*

Attributes

Common attributes

Name	Type	Default
class	Enumeration: limit	None

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.

Parents

These elements contain constant: action, application, attribution, bibliomisc, bridgehead, citation, citetitle, classsynopsisinfo, code, command, computeroutput, database, emphasis, entry, filename, firstterm, foreignphrase, funcparams, funcsynopsisinfo, function, glosssee, glossseealso, glossterm, hardware, interfacename, keycap, lineannotation, link, literal, literallayout, lotentry, member, msgaud, olink, option, optional, para, parameter, phrase, primary, primaryie, productname, programlisting, property, quote, refdescriptor, refentrytitle, refname, refpurpose, remark, screen, screeninfo, secondary, secondaryie, see, seealso, seealsoie, seeie, seg, segtitle, simpara, subtitle, synopsis, systemitem, td, term, termdef, tertiary, tertiaryie, th, title, titleabbrev, tocback, tocentry, tocfront, trademark, ulink, userinput.

Children

The following elements occur in constant: beginpage, indexterm, inlinegraphic, inlinemediaobject, replaceable.

Attributes

class

Class identifies constants that are system or application limits (for example, the maximum length of a filename).

See Also

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

Examples

<!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<para>
In ACL, <constant>main::PCS</constant> contains the path component
separator character.
</para>

In ACL, main::PCS contains the path component separator character.

<!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<para>
The maximum legal length for a path name is 
<constant class='limit'>PATH_MAX</constant>, defined in
<filename class='headerfile'>limits.h</filename>.
</para>

The maximum legal length for a path name is PATH_MAX, defined in limits.h.