GRE spec

[barkley@sdct-sunsrv1.ncsl.nist.gov (John Barkley)]

hi,

I think I've located a pretty good candidate for a GRE spec. Unfortunately,
I don't have the spec in electronic form (and IEEE doesn't put these 
things online). I suspect that only Bob Blakley might be able to lay his hands
on a copy before the conference call tomorrow. The reference is:

	9945-2:1993 (ISO/IEC) Information Technology-Portable Operating 
		System Interface (POSIX)-Part2: Shell and Utilities
	IEEE/ANSI Std 1003.2-1992 & IEEE/ANSI 1003.2a-1992
	Section 2.8, pages 77-91, "Regular Expression Notation"
	(Note: POSIX is now known as PASC)

This spec has the advantage of being an actual standard as opposed to
something one might find Unix or Perl documentation. In addition, it seems to 
be a better "quality" spec. compared to Unix or Perl documentation.

With this spec, we could choose either the Basic Regular Expression (BRE)
notation, or the Extended Regular Expression (ERE) notation. The basic 
difference is that ERE supports "+", "?", and "|".

jb
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