Docstoc

Is Your Data Facility ISO Compliant Progress Towards Harmonizing the DDI and ISOIEC 11179

Document Sample
Is Your Data Facility ISO Compliant  Progress Towards Harmonizing the DDI and ISOIEC 11179 Powered By Docstoc
					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

28 May 2003

IASSIST 2003 - Strength in Numbers

2

WebDAIS Harmonization
• Health Canada • NESSTAR
• WebDAIS system
– Harmonization of DDI, ISO/IEC 11179, DAIS

28 May 2003

IASSIST 2003 - Strength in Numbers

3

WebDAIS Harmonization
ISO/IEC 11179

WebDAIS DDI

DAIS
28 May 2003 IASSIST 2003 - Strength in Numbers 4

WebDAIS Harmonization

28 May 2003

IASSIST 2003 - Strength in Numbers

5

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
28 May 2003 IASSIST 2003 - Strength in Numbers 6

ISO/IEC 11179 - Core Model
Data Element Concept Conceptual Domain

Conceptual Representational
Data Element
Value Domain

Variables
28 May 2003

Values
7

IASSIST 2003 - Strength in Numbers

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

28 May 2003

IASSIST 2003 - Strength in Numbers

8

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

28 May 2003

IASSIST 2003 - Strength in Numbers

9

ISO/IEC 11179 - Core Model
• Data Element
– Association of a DEC and a VD

• Examples

28 May 2003

IASSIST 2003 - Strength in Numbers

10

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
28 May 2003 IASSIST 2003 - Strength in Numbers 11

ISO/IEC 11179 - Core Model
• Two Value Domains - Marital Status Codes •
– – – –

MSC 1
M; S; D; W; Married Never Married Divorced Widowed M; S;

MSC 2
Married Not Married

28 May 2003

IASSIST 2003 - Strength in Numbers

12

ISO/IEC 11179 - Core Model
Data Elements - 4 Possibilities
DEC --> Emp-MS Res-MS

DE -->

VD -->

MSC 1

MSC 2

28 May 2003

IASSIST 2003 - Strength in Numbers

13

ISO/IEC 11179 - Core Model
• Model Rules and Constraints
– Many DEs may use the same DEC – Many DEs may use the same VD

28 May 2003

IASSIST 2003 - Strength in Numbers

14

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
28 May 2003 IASSIST 2003 - Strength in Numbers 15

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 16

28 May 2003

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 17

28 May 2003

Differences between DDI, DAIS, and ISO/IEC 11179
• DAIS
– Concept of variable group
• Not a DEC • May be added to ISO/IEC 11179

28 May 2003

IASSIST 2003 - Strength in Numbers

18

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
28 May 2003 IASSIST 2003 - Strength in Numbers 19

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


				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:5
posted:8/25/2009
language:English
pages:20
Lingjuan Ma Lingjuan Ma MS
About work for China Compulsory Certification. Some of the documents come from Internet, if you hold the copyright please contact me by huangcaijin@sohu.com