[DDI-SRG] DataKind

[Wendy Thomas]

ok...we're in aggreement. Basically the question is do we need both a 
DataKind related to data source AND another related to products at the 
studyunit level.

Wendy

On Thu, 3 Jan 2008, Sanda Ionescu wrote:

> Yes, I understand, except it's very hard to generalize starting from a
> Census example, as this is a "special" case.
> Yet, it is true that if the DataKind is "census/enumeration" then the
> product may be either micro- or aggregate. That was my point too.
> Microdata or aggregate data describe the product.
> But in non-census studies we can have multiple dataKinds - for instance,
> both survey and administrative records, or experiments, etc.
> and only one type of data product - numeric, and microdata.
> Usually, but not necessarily, the different dataKinds would be stored in
> different physical files.
> So, that's my two cents. I do not have a definitive solution.
> But it's definitely a topic for further discussion. This is an issue
> that needs to be clarified.
>
> Sanda.
>
> Sanda Ionescu
> ICPSR
> University of Michigan
> P.O. Box 1248
> Ann Arbor, MI 48106
>
> Phone, Fax: 734-615-7890
> -----Original Message-----
> From: Wendy Thomas [mailto:wlt at pop.umn.edu]
> Sent: Thursday, January 03, 2008 1:25 PM
> To: Sanda Ionescu
> Cc: ddi-srg at icpsr.umich.edu; Mary Vardigan
> Subject: RE: DataKind
>
> Sanda,
>
> re: the last statement...just my cryptic shorthand :)
>
> In 2.1 if you had the 1990 PUMS 5% and the 1990 STF3 you'd have two DDI
> instances each with one data collection source 1990 US Census and one
> logical product (either PUMS 5% or STF3). In DDI 3.0 you'd have one DDI
> instance covering the 1990 US Census containing multiple data products
> (PUMS 5%, STF3, etc.) Each product would have a kind of data (microdata,
> aggregate data, but come from the same data source census/enumeration
> and survey.
>
> Wendy
>
>
> On Thu, 3 Jan 2008, Sanda Ionescu wrote:
>
>> Wendy, Mary, and others.
>>
>> Looking more closely at the enumeration below, I think there is some
>> inconsistency, in that most concepts indicate how the data were
>> collected (by means of a survey, or an experiment, or observations,
>> etc.) while "aggregate data" does refer to the data product, and
> should
>> be a counterpart to "microdata" - possibly within a different
>> classification.
>> Maybe we should re-analyze this list within the Controlled
> Vocabularies
>> group and see what makes sense. But we definitely need a DataKind
> entry,
>> I think.
>>
>> I may be thick, but I'm not sure exactly what you mean by "in  3.0
> there
>> can be a n..1 (product to source) relationship". What is the "product"
>> you refer to? a data file? can you give an example?
>>
>> Sanda.
>>
>>
>> Sanda Ionescu
>> ICPSR
>> University of Michigan
>> P.O. Box 1248
>> Ann Arbor, MI 48106
>>
>> Phone, Fax: 734-615-7890
>> -----Original Message-----
>> From: Wendy Thomas [mailto:wlt at pop.umn.edu]
>> Sent: Thursday, January 03, 2008 12:05 PM
>> To: ddi-srg at icpsr.umich.edu
>> Cc: Mary Vardigan; Sanda Ionescu
>> Subject: DataKind
>>
>> I am adding the bug on missing DataKind and have a question. In DDI
> 2.0
>> there was a different StudyUnit for each logical product (e.g.
>> microdata, aggregate, etc from the 1990 Census). Does DataKind refer
> to
>> the data SOURCE or the data PRODUCT?
>>
>> <!-- 2.2.3.10 Kind of Data.
>> -->
>> <!-- The type of data included in the file: survey data,
>> census/enumeration
>>       data, aggregate data, clinical data, event/transaction data,
>> program
>>       source code, machine-readable text, administrative records data,
>>       experimental data, psychological test, textual data, coded
>> textual,
>>       coded documents, time budget diaries, observation data/ratings,
>>       process-produced data, etc.
>> -->
>>
>> This is a subelement of Summary Description
>>
>> Wendy
>>
>>
>> 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
>>
>
> 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
>
> _______________________________________________
> DDI-SRG mailing list
> DDI-SRG at icpsr.umich.edu
> http://www.icpsr.umich.edu/mailman/listinfo/ddi-srg
>

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