s/comment --- transform a list of nodenames followed by a     ---/&/
s/comment --- chapter or a section name, into a Sed script    ---/&/
s/comment --- which adds chapter, section numbers to indices. ---/&/

/^@node[ 	]/ {
  N
  s/\n/!!=!!/
  /^@node  *Top[^a-z]/d
  s/^@node  *\([^,][^,]*\),.*!!=!!@\([a-z][a-z]*\)[ 	][ 	]*\([0-9]\(\.*[0-9]\)*\).*/s|\\(@w{\1}.*<\/A>\\)@\\*|\\1  [\2 \3]@*|/
}