texinfo: Conditionals

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Defining New Texinfo Commands

Internationalization

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18 Conditionally Visible Text
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The "conditional commands" allow you to use different text for different
output formats, or for general conditions that you define.  For example,
you can use them to specify different text for the printed manual and
the Info output.

  The conditional commands comprise the following categories.

   * Commands specific to an output format (Info, TeX, HTML, ...).

   * Commands specific to any output format _excluding_ a given one
     (e.g., not Info, not TeX, ...).

   * 'Raw' formatter text for any output format, passed straight through
     with minimal (but not zero) interpretation of @-commands.

   * Format-independent variable substitutions, and testing if a
     variable is set or clear.

Conditional Commands

Text for a given format.

Conditional Not Commands

Text for any format other than a given one.

Raw Formatter Commands

Using raw formatter commands.

Inline Conditionals

Brace-delimited conditional text.

@set @clear @value

Variable tests and substitutions.

Testing for Texinfo Commands

Testing if a Texinfo command is available.

Conditional Nesting

Using conditionals inside conditionals.