... files 36
  Care must be taken to ensure that critical symbolic references are unique across related documents.
... update 37
  Link validation can be done automatically but the updating must be done manually when filenames have changed (assuming no other symbolic label mechanism is available).
... section 38
  You either have to guess the role of each label by looking at the `labels.pl` file or by asking the author!
... information 39
  This file is designed for an NCSA server. CERN servers use “`rect`” instead of “`rectangle`,” specify a radius instead of an outer point in the circle, and enclose point coordinates by parentheses.
... Segmentation 40
  This feature is supported only for users of LATEX2e.