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Data Element Classification ISO/IEC 11179, Part 2. Bruce Bargmeyer U.S. Environmental Protection Agency Tel: (202) 260-5306 Internet: [email protected] WWW: http://sdct-sunsrv1.ncsl.nist.gov/~bargmeye. Data Elements-Fundamentals. Object Class. Property. Representation.

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data element classification iso iec 11179 part 2
Data Element Classification ISO/IEC 11179, Part 2

Bruce Bargmeyer

U.S. Environmental Protection Agency

Tel: (202) 260-5306

Internet: [email protected]

WWW: http://sdct-sunsrv1.ncsl.nist.gov/~bargmeye

data elements fundamentals
Data Elements-Fundamentals

Object

Class

Property

Representation

Data

Element

Concept

Data

Element

Core

Data

Element

Application

Data

Element

data elements fundamentals3
Data Elements-Fundamentals

Object

Class

Property

Representation

Data

Element

Concept

Conceptual

Domain

Data Value

Domain

Data

Element

Core

Data

Element

Application

Data

Element

classification fundamental notions
Classification -Fundamental Notions
  • What forms can classification take?
    • Keywords
    • Controlled Word lists, possibly based on models
    • Thesaurus
    • Taxonomy
    • Ontology
      • Acyclic directed graph, lattice
      • Multiple inheritance
data element classification

SC

NC

GA

VA

MD

OH

…………

Definition

Steward

Unique ID

Classification

Registration

Authority

Name and Context

Maintenance

Organization

Others …..

Data Element Classification
classification fundamental notions6
Classification -Fundamental Notions
  • Each node in a classification structure is a taxon (plural: taxa).
    • The taxa relating to a data element can be listed in a separate attribute of a data element
    • With adequate software, users could access and navigate the classification structure
    • A nonintelligent identifier for each taxon helps to deal with change
example classification scheme
Example Classification Scheme
  • Library of Congress keywords
  • General European Multilingual Thesaurus (GEMET)
  • Integrated Taxonomic Information System (ITIS) - biological
  • Bill Kenworthey’s taxonomy of common abstract unit nouns
utility of data element classification
Utility of Data Element Classification
  • Help to locate one data element among many (thousands)
  • Help to design similar data elements in uniform manner
  • Help to resolve synonym and homonym problems
  • Provide context not possible to put into a definition
  • May provide definitions for words found in data element definitions and names
status
Status
  • ANSI & ISO
    • Final Draft IS going out for JTC1 ballot
  • Continuing R&D
    • Concept is evolving
      • Search engines
      • Middleware - agents, mediators, request brokers
      • XML tags
    • Relationship to terminology management
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