Documentation for data set

1. Title of Data Set
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USCensus1990raw

2. Data Type
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Multivariate

3. Abstract
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The USCensus1990raw data set was obtained from the (U.S. Department of
Commerce) Census Bureau website using the Data Extraction System. This
system can be found at http://www.census.gov/DES/www/des.html.

The USCensus1990raw data set contain a one percent sample of the
Public Use Microdata Samples (PUMS) person records drawn from the full
1990 census sample (all fifty states and the District of Columbia but
not including "PUMA Cross State Lines One Percent Persons Records"). A
description of the fields and the coding of the values can be found in
the files attributes.txt and coding.htm, respectively. Additional
information can be found at the Census bureau website described above.

NOTE: The order of the USCensus1990raw data set has not been randomized.


4. Sources
   (a) Original owners of database (name/snail address/phone/email/homepage)
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The U.S. Department of Commerce Bureau
of Census. The data was extracted using the Data Extraction
System. This system can be found at http://www.census.gov/DES/www/des.html.
The email contact information is webmaster@census.gov.

   (b) Donor of database (name/snail address/phone/email/homepage)
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Chris Meek         meek@microsoft.com
Bo Thiesson        thiesson@microsoft.com
David Heckerman    heckerma@microsoft.com

5. Data Characteristics
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The data set was collected as part of the 1990 census.

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There are continuous, ordinal and categorical attributes. A
description of the fields and the coding of the values can be found in
the files USCensus1990raw.Attributes.txt and USCensus1990raw.coding.htm.

6. Other Relevant Information

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Hierarchies of values are provided in the file USCensus1990raw.coding.htm.

7. Data Format
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The data is contained in a file called USCensus1990raw.data.txt.  The
data is in the original format provided by the Bureau of Census and is
tab delimited with one case per row. The order of the variables is the
order given in the file USCensus1990raw.attributes.txt.


8. Past Usage
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9. Acknowledgements, Copyright Information, and Availability
  (a) copyright information
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  (b) usage restrictions (e.g. for research only)
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  (c) citation requests
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  (d) acknowledgements
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10. References & Further Information

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The U.S. Department of Commerce Bureau of Census website
http://www.census.gov and the Data Extraction System at
http://www.census.gov/DES/www/des.html.

Meek, Thiesson, and Heckerman (2001), "The Learning Curve Method
Applied to Clustering", to appear in The Journal of Machine Learning
Research. (Also see MSR-TR-2001-34 available at
http://research.microsoft.com/scripts/pubs/view.asp?TR_ID=MSR-TR-2001-34)