> Your missing the point.
> I am creating a design system for industrial control.
> The control devices need to be numbered. The numbers need to be sequential. 
> If the user deletes a device the numbers need to regenerate to again become 
> sequential and gapless.

Is it a bill of material line number, an ISA instrument number, or a JIC 
component tag number?

Regards,

Richard Broersma Jr.


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