Re: Topic 1: Base Level Status Schema

[Stuart Booth]

On Tue, 10 Jun 2003 17:47:26 +0100, "Kevin Hawkins"
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wrote:

>I'm trying to nudge this topic up to the top again so we can decide
>something for the developers looking at including xAP support in
existing
>controllers.
>
>Are we happy with as previously stated..????
>
>State as
>ON  OFF  UNKNOWN  NA (not applicable)
>
>And also for LEVEL expressed as a percentage eg 20% 88.3% or again
UNKNOWN
>or NA
>
>Do we have a case for the relative percent support for level eg +20% ?

So,

Level=[+-]NNN[.DD]  UNKNOWN

Level=20 (fixed value setting)
Level=+20 (increase by 20 from current level)
Level=-20 (decrease by 20 from current level)

NNN may be any number of digits appropriate to the device.
DD the same, but optional.

All good. A very common pattern that one I'd say.

Bit harder to do inc/decrementing where the level isn't "0...100"
(or
whatever), e.g. for a balance type level of "-100...0...+100"

But that's a separate "xAP name/value pattern" I think.

I'm already using the +NNN type value pattern in several of my schema,
and I've encapsulated is in a separate class in my framework, it's so
fundamental.

I don't have decimal support in it, nor the ability to accept UNKNOWN
though. I'll leave that class alone as it'll likely be used in some
schema, whereas a Level value is slightly more specialised.

You guys just keep coming up with these ideas and I'll never get my
xAPplications finished!!! ;-)

S
--
Stuart Booth
xAPFramework.net - a reusable xAP framework for .net

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