Updating Requirements --------------------- To use the updating commands, you must organize the Texinfo file hierarchically with chapters, sections, subsections, and the like. When you construct the hierarchy of the manual, do not `jump down' more than one level at a time: you can follow the `Top' node with a chapter, but not with a section; you can follow a chapter with a section, but not with a subsection. However, you may `jump up' any number of levels at one time--for example, from a subsection to a chapter. Each `@node' line, with the exception of the line for the `Top' node, must be followed by a line with a structuring command such as `@chapter', `@section', or `@unnumberedsubsec'. Each `@node' line/structuring-command line combination must look either like this: @node Comments, Minimum, Conventions, Overview @comment node-name, next, previous, up @section Comments or like this (without the `@comment' line): @node Comments, Minimum, Conventions, Overview @section Comments In this example, `Comments' is the name of both the node and the section. The next node is called `Minimum' and the previous node is called `Conventions'. The `Comments' section is within the `Overview' node, which is specified by the `Up' pointer. (Instead of an `@comment' line, you may also write an `@ifinfo' line.) If a file has a `Top' node, it must be called `top' or `Top' and be the first node in the file. The menu updating commands create a menu of sections within a chapter, a menu of subsections within a section, and so on. This means that you must have a `Top' node if you want a menu of chapters. Incidentally, the `makeinfo' command will create an Info file for a hierarchically organized Texinfo file that lacks `Next', `Previous' and `Up' pointers. Thus, if you can be sure that your Texinfo file will be formatted with `makeinfo', you have no need for the update node commands. (Note: Creating an Info File, for more information about `makeinfo'.) However, both `makeinfo' and the `texinfo-format-...' commands require that you insert menus in the file.
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