[DDI-SRG] InstrumentType ControlConstructReference JEREMY DAN READ THIS

[Dan Smith]

Hi Wendy,

I believe that ControlConstructScheme was meant to be unordered, simply 
a collection of the ControlConstructs that are used to create the 
instrument.  The ControlConstructReference in the InstrumentType was 
intended to point to the initiating/top ControlConstruct, which can then 
continue to reference the rest of the instrument.

If you feel there is a better way, we can discuss it over a drink at 
Town Hall.

Cheers,
Dan

Wendy Thomas wrote:
> Before entering a bug I want to know if it really is a bug or the 
> structure was intended.
> 
> InstrumentType currently contains a ControlConstructReference 0..1 
> (allowing for reference to an instrument that has not had its contents 
> described in DDI)
> 
> ControlConstructScheme contains ControlConstruct 1..n implying that 
> multiple independent control sequences can be stored in a single 
> ControlConstructScheme and the Instrument is referencing the top construct 
> of its initiating sequence.
> 
> If this is how its supposed to be, fine, I'll make sure it is documented 
> in this way.
> 
> However, if a ControlConstructScheme was intended to contain a single 
> master seqence then InstrumentType should change ControlConstructReference 
> to ControlConstructSchemeReference and ControlConstructScheme should 
> change its ControlConstruct to 1..1 forcing a single starting point for 
> the control sequence.
> 
> Which is correct? You may have discussed this while I was at the Doctor's.
> I hope Jeremy and Dan are paying attention to this email ;)
> 
> Wendy
> 
> Wendy L. Thomas                          Phone: +1 612.624.4389
> Data Access Core Director		 Fax:   +1 612.626.8375
> Minnesota Population Center              Email: wlt at pop.umn.edu
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-- 
Dan Smith
+1 608-213-2867
Algenta Technologies, LLC
http://www.algenta.com