Chapter Structuring
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The "chapter structuring" commands divide a document into a hierarchy
of chapters, sections, subsections, and subsubsections. These commands
generate large headings; they also provide information for the table of
contents of a printed manual (*note Generating a Table of Contents:
Contents.).
The chapter structuring commands do not create an Info node structure,
so normally you should put an `@node' command immediately before each
chapter structuring command (Note:Nodes). The only time you are
likely to use the chapter structuring commands without using the node
structuring commands is if you are writing a document that contains no
cross references and will never be transformed into Info format.
It is unlikely that you will ever write a Texinfo file that is
intended only as an Info file and not as a printable document. If you
do, you might still use chapter structuring commands to create a
heading at the top of each node--but you don't need to.