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Subject: Re: dataAccess V4 Ca client propertyId questions
From: Ralph Lange <Ralph.Lange@bessy.de>
To: Kay-Uwe Kasemir <kasemirk@ornl.gov>
Cc: EPICS Core Talk <core-talk@aps.anl.gov>
Date: Tue, 28 Jun 2005 15:38:39 +0200
Kay-Uwe Kasemir wrote:

Hi:

How does it get started, i.e. how does it know how to find properties associated with the pvname?

I forgot the circumstances, but one point at the SLAC meeting
was that we might have to abandon the idea of "fred" == "fred.VAL".

If you want the default value, you'll have to use "fred.value"
in the new command-line 'caget' or the 'probe' GUI.
If you use "fred", you will get _all_ properties of fred.

It'll be consistent for the whole hierarchy:
In case "fred.limits" is a structure, "fred.limits" will get
all structure elements. "fred.limits.display.high" might drill
down to a structure element.

Yes. But maybe not quite exactly.

Have a look at the wiki page where Andrew describes the idea of Views. For me, that's a really really promising way to go. Grouping things in a reasonable way, providing flat as well as deep structures, use of parameters, there's a lot of good stuff in there. Gains attraction while you think about it.

http://www.aps.anl.gov/epics/wiki/index.php/V4_Standard_Properties_and_Events#Views

Ralph


References:
dataAccess V4 Ca client propertyId questions Marty Kraimer
Re: dataAccess V4 Ca client propertyId questions Kay-Uwe Kasemir

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