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From: preece@urbana.mcd.mot.COM (Scott E. Preece)
Newsgroups: comp.windows.x
Subject: Re:  X Windows and Unix SysVR4
Message-ID: <9101291532.AA17810@etude.urbana.mcd.mot.com>
Date: 29 Jan 91 15:32:02 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 24

|From: Kevin.N.Broekhoven@queensu.ca
|I know that OpenLook is part of the SysVR4 specification, and that OpenLook is
|currently implemented using the X11 protocol.
|However is X11 part of the SysVR4 specification?  Would these guys
|be free to implement OpenLook with some other windowing system in the future,
|or is the X11 component of the specification cast in stone?
---
OPEN LOOK is actually a look and feel specification rather than a
toolkit.  There are several toolkits implementing it in different ways.
The XView toolkit, for instance, is X based but not Xt based, while the
OLIT toolkit is Xt based.  You are free to implement it any way you like.

If you want to comply with the SVID or an SVR4 ABI, you do
have to support Xlib (to the X11R3 spec), but don't need to support
either Xt or OPEN LOOK.
---
|Similarly, Motif is (will be?) part of the OSF/1 operating system spec.  Motif
|is currently implemented with X11.  Is X11 a fixed part of the OSF/Motif spec,
|or could OSF change to another windowing protocol in the future?
---
Actually, OSF/Motif is not part of the OSF/1 spec.  It is covered by a
separate OSF specification (the Application Environment Specification)
which can live on top of a variety of operating systems.  There are
several toolkits implementing the OSF/Motif look and feel as well.