Experimental Physics and
Industrial Control System

Benjamin Franksen <[email protected]> · Thu, 19 Jul 2001 00:13:07 +0200

Marty,

I prefer your solution; it is so simple, I ask myself why this wasn't
done when the link definition was changed so that "" != "0" (was that
3.13.1?).

> The bad effect is that users have two ways to define values for the VAL field,
> e.g. assign values to VAL itself or else assign values to the associated link
> field. Does this matter? Maybe not.

Definitely not. Anyway you'll have to have two ways if you want to be
backward compatible. Remember the solution for the linear conversion?

Something else: Some people might get different behavior with existing
databases because of VAL assignments which are now ignored. It should be
fairly easy, though, to run a simple (perl) script to detect such
assignments and throw them out if the default should be undefined value.

Anyway, each site can make this change by themselves.

Ben
-- 
Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
(BESSY) GmbH, Control System Group
Albert-Einstein-Straße 15, 12489 Berlin, +4930 6392 8462, www.bessy.de

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System