[DDI-users] varGrp/var relationships

Wendy Thomas wlt at pop.umn.edu
Mon Oct 9 13:21:16 EDT 2006


The single attribute var can hold an array of var IDs.

Wendy

On Mon, 9 Oct 2006, Steve McRoberts wrote:

> Can anyone provide an example of varGrp/var relationships usage? I have 25 
> groups of 10-50 var elements per group. It seems natural to me to specify the 
> groups in varGrp then reference the varGrp id in the var. Apparently this was 
> original intent but later changed when reading from the following 
> documentation excerpts.
>
> "<!--vargrp attribute on var element removed as redundant;
> use var attribute on vargrp element to
> encode vargrp to var relationships -->"
>
> "<varGrp><notes>This variable group was created for the purpose of
> combining all derived variables.</notes></varGrp>"
>
> But how does one reference all the var id's in the varGrp? There's only a 
> single attribute of var.
>
> Steve McRoberts
> Institute on Aging
> University of Wisconsin - Madison
> 608-265-6757
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> DDI-users at icpsr.umich.edu
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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
50 Willey Hall
225 19th Avenue South
Minneapolis, MN 55455


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