Nodes
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"Nodes" are the primary segments of a Texinfo file. They do not
themselves impose a hierarchical or any other kind of structure on a
file. Nodes contain "node pointers" that name other nodes, and can
contain "menus" which are lists of nodes. In Info, the movement
commands can carry you to a pointed-to node or to a node listed in a
menu. Node pointers and menus provide structure for Info files just as
chapters, sections, subsections, and the like, provide structure for
printed books.