texinfo: Info Format Tag Table

Info Format General Layout

Info Format Local Variables

Info Format Indirect Tag Table

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Info Format: Tag Table
----------------------

The tag table specifies the starting byte position of each node and
anchor in the file.  It is written in the main output file only, not (in
the case of split output) any subfiles.

         <tag table> =
     ^_
     Tag Table:
     <lparen>Indirect<rparen> # this line appears in split output only
     (Node|Ref): <nodeid>^?<bytepos>
     ^_
     End Tag Table

  The '(Indirect)' line is the next line after 'Tag Table:' in the case
of split output only.

  Each following line defines an identifier as either an anchor or a
node, as specific.  It is an error to define the same identifier both
ways.  For example, 'Node: Top^?1647' says that the node named 'Top'
starts at byte 1647 while 'Ref: Overview-Footnote-1^?30045' says that
the anchor named 'Overview-Footnote-1' starts at byte 30045.

  In the case of nonsplit output, the byte positions simply refer to the
location in the output file.  In the case of split output, the byte
positions refer to an imaginary file created by concatenating all the
split files (but not the top-level file).  See the previous section.

  Here is an example:

     ^_
     Tag Table:
     Node: Top^_89
     Node: Ch1^_292
     ^_
     End Tag Table

  This specifies a manual with two nodes, 'Top' and 'Ch1', at byte
positions 89 and 292 respectively.  Because the '(Indirect)' line is not
present, the manual is not split.