LOG OF SIGNIFICANT CHANGES

Release	Sections Changed	Brief Notes
Date
1992 Sep 21		Version published in Legacy 2
1994 Nov 30	All	Made compatible with LaTeX2HTML software
1995 Mar 5	All	Overhauled and proper description of
		multiple dataset files added
1997 Jun 25	All	Removed some ambiguities and changed DATA
		column from I*2 to I*4
1998 Dec 2	All	Replaced HDUVERSn with HDUVERS to comply with
		HFWG recommendation R8. Clarified which keywords
		are mandatory and which optional
2001 Mar 19	All	Allowed 4-byte integer CHANNEL number and
		AREASCAL and BACKSCAL as vectors
2003 Apr 23	3.2	Clarified text to make clear that any keyword
		can become a column
2004 Apr 12	3.2, 3.4	Allowed 2-byte COUNTS
2006 May 6	3, 4.2	Reorganized and fixed error in type II example