[DDI-CDG] Proposal of a structure for collections of surveys

[Wendy Thomas]

Hi Everyone,

I've been buried in work lately (and the work of the Structural Reform
Group) so I haven't had a chance yet to delve into all your writings. I
just wanted to provide an update on the direction the SRG is going in
terms of schema. We are basically going towards multiple technical
implementations of the DDI stucture. Whatever can be represented in both
DTD and Schema will be. There may be more, or more tightly defined
extensions in the Schema implemnetation, but we are not close to fleshing
this out yet.

How is everything in the varioius parts of Germany? I had hoped to get
there this spring but there is no way I can get away. Maybe over the
summer if everything works out. Now that I have a few things out of the
way for SRG tasks, I'll turn my attention to this group. It will be a nice
break for me  :-)

Best to all
Wendy


On Thu, 19 Feb 2004, Joachim Wackerow wrote:

> In addition to the proposal of 2004-02-06 I made a 'quick and dirty'
> example CDG DDI DTD. It was usefull for myself to clarify some points.
> It is not necessary to use XML Schema, as I thought. I think the
> structural reform group is planning to use XML Schema anyway.
>
> The example CDG DDI DTD is a super set of the DDI DTD V2.0. XInclude is
> included in two places. With this DTD it is possible to validate the
> attached example CDG DDI files. The XPointer expression is simple, if an
> ID attribute and the DTD is used.
>
> The attached ZIP file includes the following files:
>
> DDI-CDG.dtd - super set of DDI DTD version 2.0
> DTD_diff.txt - Difference file to original DTD
> Tables.dtd - original Tables DTD, necessary for DDI DTD
> MZ1996_dtd.xml - individual codebook according DDI-CDG.dtd
> collection_of_surveys_dtd.xml - collection of surveys, codebook
> description as a subset of individual codebooks, according DDI-CDG.dtd
> collection_of_collections_dtd.xml - the same for collections of collections
> example.xsl - example stylesheet to extract information on a variable
> from a individual codebook; the information is actually stored in the
> collection codebook.
> example.bat - the command for the XSL transformer xsltproc
> (http://www.xmlsoft.org/)
>
> Kind regards Achim
>

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
537 Heller Hall
271 19th Avenue South
Minneapolis, MN 55455