Here is a complete, short sample Texinfo file, without any commentary. You can see this file, with comments, in the first chapter. See section A Short Sample Texinfo File.
\input texinfo @c -*-texinfo-*- @c %**start of header @setfilename sample.info @settitle Sample Document @c %**end of header @setchapternewpage odd @ifinfo This is a short example of a complete Texinfo file. Copyright 1990 Free Software Foundation, Inc. @end ifinfo @titlepage @sp 10 @comment The title is printed in a large font. @center @titlefont{Sample Title} @c The following two commands start the copyright page. @page @vskip 0pt plus 1filll Copyright @copyright{} 1990 Free Software Foundation, Inc. @end titlepage @node Top, First Chapter, (dir), (dir) @comment node-name, next, previous, up @menu * First Chapter:: The first chapter is the only chapter in this sample. * Concept Index:: This index has two entries. @end menu @node First Chapter, Concept Index, Top, Top @comment node-name, next, previous, up @chapter First Chapter @cindex Sample index entry This is the contents of the first chapter. @cindex Another sample index entry Here is a numbered list. @enumerate @item This is the first item. @item This is the second item. @end enumerate The @code{makeinfo} and @code{texinfo-format-buffer} commands transform a Texinfo file such as this into an Info file; and @TeX{} typesets it for a printed manual. @node Concept Index, , First Chapter, Top @comment node-name, next, previous, up @unnumbered Concept Index @printindex cp @contents @bye