@node Line Requirements

Here are several requirements for @node lines:

• All the node names for a single Info file must be unique.

  Duplicates confuse the Info movement commands. This means, for example, that if you end every chapter with a summary, you must name each summary node differently. You cannot just call each one "Summary". You may, however, duplicate the titles of chapters, sections, and the like. Thus you can end each chapter in a book with a section called "Summary", so long as the node names for those sections are all different.

• A pointer name must be the name of a node.

  The node to which a pointer points may come before or after the node containing the pointer.

• @-commands in node names are not allowed. This includes punctuation characters that are escaped with a @, such as @ and {. (For a few rare cases when this is useful, Texinfo has limited support for using @-commands in node names; see Pointer Validation.)
• Unfortunately, you cannot use periods, commas, colons or parentheses within a node name; these confuse the Texinfo processors.

  For example, the following is a section title in this manual:

            @code{@@unnumberedsec}, @code{@@appendixsec}, @code{@@heading}
            

  But the corresponding node name lacks the commas and the @'s:

            unnumberedsec appendixsec heading
            

• Case is significant.