XMLStarlet Toolkit: Convert XML into PYX format (based on ESIS - ISO 8879)
Usage: PROG pyx {<xml-file>}
where
  <xml-file> - input XML document file name (stdin is used if missing)

The PYX format is a line-oriented representation of
XML documents that is derived from the SGML ESIS format.
(see ESIS - ISO 8879 Element Structure Information Set spec,
ISO/IEC JTC1/SC18/WG8 N931 (ESIS))

A non-validating, ESIS generating tool originally developed for
pyxie project (see http://pyxie.sourceforge.net/)
ESIS Generation by Sean Mc Grath http://www.digitome.com/sean.html

