[DDI-SRG] Missing value use case

[Wendy Thomas]

re: adding to NumericRepresentation/NumberRange
1) this is used by both questions and variables and we need to be careful 
that what goes in these is applicable to both
2) this problem is not limited to numeric and you can only have one 
representation

On Thu, 24 Apr 2008, Pascal Heus wrote:

> All:
> I've been exchanging email with a R user/developer in Italy who is
> integrating DDI into R (as part of an SPSS reader plugin). He needs to
> express a missing value range on a continuous variable (like all values
> between 3 and 5). I think we explicitly excluded this option but we may
> want to revisit since we may have use cases for this (gathering more
> info). I think we could address this by adding a isMissing attribute to
> the NumericRepresentation/NumberRange element.
> *P
>
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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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