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Is Your Data Facility ISO Compliant? Progress Towards Harmonizing the DDI and ISO/IEC 11179

Is Your Data Facility ISO Compliant? Progress Towards Harmonizing the DDI and ISO/IEC 11179. Dan Gillman Information Scientist US Bureau of Labor Statistics. Introduction. WebDAIS ISO/IEC 11179 Core Model Registration Differences between DDI, DAIS, 11179 WebDAIS model.

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Is Your Data Facility ISO Compliant? Progress Towards Harmonizing the DDI and ISO/IEC 11179

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  1. Is Your Data Facility ISO Compliant?Progress Towards Harmonizing the DDI and ISO/IEC 11179 Dan Gillman Information Scientist US Bureau of Labor Statistics

  2. Introduction • WebDAIS • ISO/IEC 11179 • Core Model • Registration • Differences between DDI, DAIS, 11179 • WebDAIS model IASSIST 2003 - Strength in Numbers

  3. WebDAIS Harmonization • Health Canada • NESSTAR • WebDAIS system • Harmonization of DDI, ISO/IEC 11179, DAIS IASSIST 2003 - Strength in Numbers

  4. WebDAIS Harmonization ISO/IEC 11179 WebDAIS DDI DAIS IASSIST 2003 - Strength in Numbers

  5. WebDAIS Harmonization IASSIST 2003 - Strength in Numbers

  6. ISO/IEC 11179 • 6 Part International Standard • Under revision • Old - Specification and standardization of data elements • New - Metadata registries • All freely available at ISO web site • www.iso.ch IASSIST 2003 - Strength in Numbers

  7. ISO/IEC 11179 - Core Model Data Element Concept Conceptual Domain Conceptual Representational Data Element Value Domain Variables Values IASSIST 2003 - Strength in Numbers

  8. ISO/IEC 11179 - Core Model • Permissible Value • A value and the value meaning • Value Domain • A set of permissible values • Conceptual Domain • A set of value meanings IASSIST 2003 - Strength in Numbers

  9. ISO/IEC 11179 - Core Model • Object Class (i.e., population) • A set of objects on which observations are taken • Property (i.e., characteristic) • A feature that describes or distinguishes objects • Data Element Concept • The concept formed by Object Class + Property IASSIST 2003 - Strength in Numbers

  10. ISO/IEC 11179 - Core Model • Data Element • Association of a DEC and a VD • Examples IASSIST 2003 - Strength in Numbers

  11. ISO/IEC 11179 - Core Model • Two Data Element Concepts • DEC 1 • Object Class -- Employees of BLS • Property -- Marital Status • DEC 2 • Object Class -- Adult Residents of Ontario • Property -- Marital Status IASSIST 2003 - Strength in Numbers

  12. ISO/IEC 11179 - Core Model • Two Value Domains - Marital Status Codes • MSC 1 MSC 2 • M; Married M; Married • S; Never Married S; Not Married • D; Divorced • W; Widowed IASSIST 2003 - Strength in Numbers

  13. ISO/IEC 11179 - Core Model Data Elements - 4 Possibilities DEC --> Emp-MS Res-MS DE --> VD --> MSC 1 MSC 2 IASSIST 2003 - Strength in Numbers

  14. ISO/IEC 11179 - Core Model • Model Rules and Constraints • Many DEs may use the same DEC • Many DEs may use the same VD IASSIST 2003 - Strength in Numbers

  15. ISO/IEC 11179 - Registration and Administration • Registration - • Registration is the process whereby unambiguous identifiers are formally associated with objects. • Administration - • Manages life-cycle of descriptions • Administration records • Monitors quality of metadata • Registration status • Applies to scope of registry, not just core model IASSIST 2003 - Strength in Numbers

  16. Differences between DDI, DAIS, and ISO/IEC 11179 • DDI • Subject matter specific • End user perspective - “Metadata after the data” • XML DTD - not UML model • Data set oriented • Document oriented - codebook • “Study” is highest level of abstraction IASSIST 2003 - Strength in Numbers

  17. Differences between DDI, DAIS, and ISO/IEC 11179 • ISO/IEC 11179 • Independent of particular subject matter • Producer perspective - “Metadata before the data” • UML model • Data and database oriented • “Concept” is highest level of abstraction • “Administration” is highest level of function IASSIST 2003 - Strength in Numbers

  18. Differences between DDI, DAIS, and ISO/IEC 11179 • DAIS • Concept of variable group • Not a DEC • May be added to ISO/IEC 11179 IASSIST 2003 - Strength in Numbers

  19. WebDAIS Model • Imported from ISO/IEC 11179 • Administration functions • WebDAIS will act as a registry • Concept management (DEC and CD) • Enables harmonization of data • Future • Build model for DDI • Harmonize with ISO/IEC 11179 IASSIST 2003 - Strength in Numbers

  20. Contact Dan Gillman Gillman.Daniel@BLS.Gov +1.202.691.7523

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