DocBook 5.1: The Definitive Guide  (Version 1.5.3 for DocBook 5.1)


parameter — A value or a symbolic reference to a value.


parameter ::= [-]


Common attributes and common linking attributes.

Additional attributes:

  • class (enumeration)
    • “command”
    • “function”
    • “option”


A parameter identifies something passed from one part of a computer system to another. In this regard parameter is fairly generic, but it may have a more constrained semantic in some contexts (e.g., in a paramdef).

In a document that describes more than one kind of parameter—for example, parameters to functions and commands—the class attribute can be used to distinguish between them, if necessary.

Processing expectations

Formatted inline.


Common attributes and common linking attributes.


Identifies the class of parameter

Enumerated values:

A command


A function


An option


The following elements occur in parameter: text, abbrev, acronym, alt, anchor, annotation, biblioref, coref, date, emphasis (db._emphasis), firstterm (db._firstterm), footnote, footnoteref, foreignphrase (db._foreignphrase), glossterm (db._glossterm), indexterm (db.indexterm.endofrange), indexterm (db.indexterm.singular), indexterm (db.indexterm.startofrange), inlinemediaobject, link, olink, phrase (db._phrase), quote (db._quote), remark, replaceable, subscript, superscript, trademark, wordasword, xref.


<article xmlns=''>
<title>Example parameter</title>

<para>Using the <parameter class='command'>-l</parameter> parameter on the
Linux <command>ls</command> command prints a long directory listing.


Using the -l parameter on the Linux ls command prints a long directory listing.