[DDI-SRG] [Fwd: Coded missing values]

[Wendy Thomas]

Pascal,

Unless we add a record layout for supporting statistical softwares we 
won't have this. However, I put in a draft of a possible generic structure 
on one of the spread sheets I put in mantis (in red at the bottom). This 
will clearly need to be expanded. Also some decision about the 
advisability of a generic statistical package description as opposed to a 
SAS, SPSS, STATA etc individual record layout substitution sections.

Wendy


On Wed, 29 Aug 2007, Pascal Heus wrote:

> Further to the message below. in SPSS, I can also define a range of coded 
> missing values (like 10-20), is this something we'll support in 3.0?
> thanks
> *P
>
> -------- Original Message --------
> Subject: 	Coded missing values
> Date: 	Wed, 29 Aug 2007 11:47:23 -0400
> From: 	Pascal Heus <pascal.heus at gmail.com>
> To: 	DDI Structural Reform Working Group. <ddi-srg at icpsr.umich.edu>
>
>
>
> All:
> I have a couple of questions on coded missing values (like -1=missing, not 
> system missing) :
> - In DDI 2.0, missing values are flagged in the catgry element of the 
> variable. However, in SPSS, I can define missing value codes without defining 
> categories. In such case, is there a way to capture this in DDI 2.0?
> - How do we capture missing value codes in DDI 3.0? According to Wendy's 
> mapping, it goes into the l:category element. As in the SPSS example above, I 
> could however define a discrete code value that is not associated with a 
> l:category but represent a missing value. Should I file this issue in Mantis?
> thanks
> *P
>
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> - Albert Einstein
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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
University of Minnesota
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225 19th Avenue South
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