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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: bargmeyer.bruce@epa.gov 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

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  1. Data Element Classification ISO/IEC 11179, Part 2 Bruce Bargmeyer U.S. Environmental Protection Agency Tel: (202) 260-5306 Internet: bargmeyer.bruce@epa.gov WWW: http://sdct-sunsrv1.ncsl.nist.gov/~bargmeye

  2. Data Elements-Fundamentals Object Class Property Representation Data Element Concept Data Element Core Data Element Application Data Element

  3. Data Elements-Fundamentals Object Class Property Representation Data Element Concept Conceptual Domain Data Value Domain Data Element Core Data Element Application Data Element

  4. 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

  5. SC NC GA VA MD OH ………… Definition Steward Unique ID Classification Registration Authority Name and Context Maintenance Organization Others ….. Data Element Classification

  6. 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

  7. 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

  8. 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

  9. 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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