Statistical Metadata Extensions to the X3.285 Metamodel

1
Statistical Metadata Extensions to the X3.285
Metamodel

• By
• Daniel W. Gillman
• Chairman, NCITS/L8
• U.S. Bureau of the Census

2
Introduction

• Context
• Need
• Definitions
• Census Bureau
• Uses for Statistical Metadata
• Extensions
• Conclusion

3
Context

• Metadata
• Data about Data
• One Persons Metadata Is Anothers Data
• Context
• Statistics

4
Statistical Data

• Microdata
• Data about individual objects collected through a
  survey or experiment.
• Macrodata
• Data derived through statistical aggregation or
  other manipulation from microdata or other
  macrodata.

5
Statistical Metadata

• Descriptive information or documentation that
  facilitates sharing and understanding statistical
  data over the lifetime of the data.
• Includes
• file location, record layout, database schemas,
  data dictionary, definitions, questions,
  questionnaires, sample design, processing steps,
  data quality, etc.

6
Census Bureau Metadata Objectives

• Gain Acceptance of One Logical Metadata Registry
  Model
• Support wide Range of Projects, Surveys,
  Applications, and Users
• Comply with Federal Standards

7
Purposes of a Statistical Metadata Repository

• End-user oriented
• Electronic Data Dissemination
• Production oriented
• Automated Survey Design and Processing

8
Functions of the CMR

• Locate Data Sets
• Link Common Data Sets
• Locate Information About Data Elements
• Locate Documentation
• Link Common Documents
• Link Images

9
Repository Model Overview
Registration
Business Data
Documen- tation
Data Element
Metamodel
10
Business Data Model
Survey Instance
Survey
Questionnaire
Questions
Sample
Data Sets
Products
Universe/Frame
11
Registration Model
Common Attributes
Administered Component
Classification Scheme
Objects ...
12
Documentation Model
Administered Component
Documentation Type
Documentation
13
Conclusion