[DDI-CDG] Longitudinal data proposal

[Sanda Ionescu]

Hi, all.
I am hereby submitting to the SRG a proposal for marking up longitudinal 
data in DDI Version 3.0.
Please find attached the required supporting documents - a modeling 
spreadsheet (with two sheets) and the accompanying 
explanation/argumentation in word format.
My proposal arose from concrete needs experienced in working with 
longitudinal data, and may not fit neatly in any of the working group agendas.
While I was mainly working from the complex files perspective, I am aware 
that at least parts of it might overlap with the efforts of the comparative 
data group, whom I am also copying on this message.
Thank you for your consideration.
Sanda.



Sanda Ionescu,
Research Associate
Inter-university Consortium for Political and Social Research (ICPSR)
The University of Michigan
P.O. Box 1248
Ann Arbor, MI 48106

Phone: (734) 615-7890
Fax: (734) 615-7890
        (734) 647-8200
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