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<== Date ==> <== Thread ==>

Subject: Re: Fwd: Tagnames
From: Andrew Johnson <anj@aps.anl.gov>
To: tech-talk@aps.anl.gov
Date: Wed, 10 Oct 2012 13:15:38 -0500
Hi,

On 2012-10-10 J. Lewis Muir wrote:
> On 10/10/12 12:06 PM, Paul Sichta wrote:
> > Two relevant messages which are so old they may be wrong:
> > name length is 60 chars:
> > http://www.aps.anl.gov/epics/tech-talk/2005/msg00083.php
> 
> In November 2006, Andrew Johnson recommended limiting record
> names to 28 characters in length:
> 
>   http://www.aps.anl.gov/epics/tech-talk/2006/msg01310.php

That 2006 email demonstrates why adding long string support to Base 3.14.12 in 
2010 was important; it allows link addresses longer than 40 characters to be 
written to link fields at run-time, thus enabling sites to use record names 
longer than 28 characters without compromising their ability to modify the 
database configuration on the fly.  Client programs do have to be able to 
detect and use the long string semantics though, and developers need to 
remember to append a '$' to the field name when accessing link fields though.

- Andrew
-- 
Never interrupt your enemy when he is making a mistake.
-- Napoleon Bonaparte

References:
Tagnames Jeřábek Jiří
Fwd: Tagnames Paul Sichta
Re: Fwd: Tagnames J. Lewis Muir

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