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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. Quick Overview of ISO/IEC 11179 WebDAIS WebDAIS Model Data Set Model Variable Model ISO/IEC 11179 Cube 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 • Quick Overview of ISO/IEC 11179 • WebDAIS • WebDAIS Model • Data Set Model • Variable Model • ISO/IEC 11179 • Cube Model • Container Model • Administration Model • Miscellaneous Model IASSIST 2003 - Strength in Numbers

  3. ISO/IEC 11179 • 6 Part International Standard • First version completed in 2000 • 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

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

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

  6. WebDAIS Harmonization IASSIST 2003 - Strength in Numbers

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

  8. WebDAIS Model • Model Components • Data Set Model • Variable Model • Cube Model • Container Model • Administration Model • Miscellaneous Model IASSIST 2003 - Strength in Numbers

  9. WebDAIS Model • Data Set Model • DDI Perspective • New – Link to Variables • Variables Associated with Many Data Sets IASSIST 2003 - Strength in Numbers

  10. WebDAIS Model • Variable Model (ISO/IEC 11179) • Conceptual • 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

  11. WebDAIS Model • Variable Model (ISO/IEC 11179) • Representational • 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

  12. WebDAIS Model • Variable Model (ISO/IEC 11179) • Data Element • Association of a DEC and a VD • ISO/IEC 11179 Core Model • Examples IASSIST 2003 - Strength in Numbers

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

  14. WebDAIS Model • Variable Model (ISO/IEC 11179) – Example • 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

  15. WebDAIS Model • Variable Model (ISO/IEC 11179) - Example • 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

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

  17. WebDAIS Model • Cube Model • Strictly from DDI • Not in ISO/IEC 11179 IASSIST 2003 - Strength in Numbers

  18. WebDAIS Model • Container Model • Classification Scheme (ISO/IEC 11179) • Bookmark List • Client Side – List of useful URLs • Browse List • Server Side – Classify Objects by Server • Variable Groups • Link Group of Variables, Based on Business Requirement IASSIST 2003 - Strength in Numbers

  19. WebDAIS Model • Administration Model (ISO/IEC 11179) • Data Archive • Data Library  Metadata Registry • ISO/IEC 11179 Metadata Registry – Really a Data Element + Value Domain + Concept Registry • Example – Car Registry • Card Catalog  Administered Items • Catalog Items  Model Attributes IASSIST 2003 - Strength in Numbers

  20. WebDAIS Model • Administration Model (ISO/IEC 11179) • What Do You Want to Keep Track of? • Descriptions of Objects • What Kind of Objects? • DDI??  Data sets • ISO/IEC 11179  Data Elements + Value Domains • Administered Item  Description of an Object IASSIST 2003 - Strength in Numbers

  21. WebDAIS Model • Administration Model (ISO/IEC 11179) • 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

  22. WebDAIS Model • Miscellaneous Model • Other Stuff IASSIST 2003 - Strength in Numbers

  23. Differences among 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

  24. Differences among 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

  25. Differences among 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

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

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