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Framework for the Specification and Standardization of Data Elements

Framework for the Specification and Standardization of Data Elements. Part1 of ISO/IEC 11179 by Daniel W. Gillman, editor Chairman, NCITS/L8 U.S. Bureau of the Census. ISO/IEC 11179. 6 Parts Parts 3 - 6 are IS Parts 1 & 2 are CD. Parts of ISO/IEC 11179. Part 1: Framework

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Framework for the Specification and Standardization of Data Elements

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  1. Framework for the Specification and Standardization of Data Elements Part1 of ISO/IEC 11179 by Daniel W. Gillman, editor Chairman, NCITS/L8 U.S. Bureau of the Census

  2. ISO/IEC 11179 • 6 Parts • Parts 3 - 6 are IS • Parts 1 & 2 are CD

  3. Parts of ISO/IEC 11179 • Part 1: Framework • Part 2: Classification • Part 3: Basic Attributes • Part 4: Formulation of Definitions • Part 5: Naming and Identification • Part 6: Registration

  4. Organization of Framework Document • Definitions • Fundamental Concepts • Other parts • Informative Annexes

  5. Purpose • Basic Information about Data • Facilitates • Understanding • Sharing • Maintenance • Access • Manipulation • Processing

  6. Data Element • A fundamental unit of data an organization manages. • A unit of data for which the definition, identification, representation, and permissible values are specified by means of a set of attributes.

  7. Database, File, Etc. Database, File, Etc. Transaction, Exchange Unit, Etc. Data Element Record, Segment, Class, Tuple, Etc. Identifier Definition Name Value Domain Etc. Data Element Identifier Definition Name Value Domain Etc. Data Element Identifier Definition Name Value Domain Etc. Field, Column, Etc. Character, Image, Sound, Etc.

  8. Fundamental Model • Taken From Data Modeling • 3 Components • object class • property • representation

  9. Object Class • Things for which we want to manage data • Entities in E-R Models • Classes in O-O Models • Employers, Persons, Automobiles, Orders, etc.

  10. Property • A peculiarity common to all members of an object class. • Distinguishes or Describes Objects • Attributes or Data Members in Models • SIC Code, Age, VIN, Date, etc.

  11. Important Distinctions • Object Class  Name • Property  Name • English vs. Chinese • Complex Object Classes • Women Between 15 and 45 Who Had  One Live Birth in last 12 Months

  12. Representation • The combination of a value domain, datatype, and, if necessary, a unit of measure or a character set.

  13. Definition: Value Domain • A set of permissible values. • Enumerated • Census State Codes • Non-Enumerated • All Real Numbers Between 0 & 1 • List of SIC Codes, Integer 0 - 125, • 17 Char Alpha-Num, YYYYMMDD

  14. Value Domains • Re-Use of Domains • SIC, NAICS, SOC Codes • Geographic Codes • Chemical Names • Biological Classification

  15. Data Element Concept • Object Class + Property • Example: Annual Household Income • Many Possible Representations • Non-Negative Integers • Categories • 1 = 0 $15000 • 2 = $15001 $30000 • 3 = $30001 $60000 • 4 = $60001 +

  16. DATA ELEMENT CONCEPT DATA ELEMENT (1:N) (1:N) Object Class Object Class Object Class (1:N) (1:1) (1:1) Property Property (1:1) Representation

  17. Data Element Concept Data Element Value Domain

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