[DDI-SRG] DataKind

[Wendy Thomas]

Ok... Unless I hear from others to the contrary, DataKind in StudyUnit 
will refer to the data source. It was already decided that it should be 
repeatable. I'll look at the logical product to see if it already provides 
information on the type of data contained in the product.

Wendy

On Thu, 3 Jan 2008, Sanda Ionescu wrote:

> I think we probably do...
> But if we have such a description related to data products, I don't
> think it should be at study unit level, but at the level where each
> individual product is described.
> And, the two entries should have different names, so that we do not
> create confusion.
>
> 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 1:50 PM
> To: Sanda Ionescu
> Cc: ddi-srg at icpsr.umich.edu; Mary Vardigan
> Subject: Re: [DDI-SRG] DataKind
>
> 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
>

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