May 2010
Intermediate to advanced
552 pages
13h 37m
English
Content preview from DocBook 5: The Definitive GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
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>
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.