The <preamble>
is text at the beginning of all output files.
It is not intended to be visible by default in an Info viewer, but
may be displayed upon user request.
<preamble> = <identification> # "This is FILENAME, produced by ..." <copying text> # Expansion of @copying text. <dir entries> # Derived from @dircategory and @direntry.
These pieces are:
<identification line>
An arbitrary string beginning the output file, followed by a blank line.
<copying text>
The expansion of a @copying
environment, if the manual has
one (see @copying
: Declare Copying Permissions).
<dir entries>
The result of any @dircategory
and @direntry
commands present in the manual (see Installing Info Directory Files).