XMLStarlet Toolkit: Convert PYX into XML
Usage: PROG p2x [<pyx-file>]
where
  <pyx-file> - input PYX 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))

