Post on 21-Jan-2016
Metadata Driven Statistical Data Warehouse System
at the Hungarian Central Statistical Office
Imre Pap
Senior IT Advisor
Hungarian Central Statistical Office
DATA WAREHOUSE for HCSO users
PRODUCTION DATABASE
Data in Processing
Data, Ready for Use
Elementary
AggregatedORACLE RDBMSStandardTables
SAS -, Cobol datasets,
Oracle none standardtables
files on PC-s
Elementary Data
Oracle relational tables with specially
Aggregated data
Oracle EXPRESS multidimensional
db.
DISSEMINATION db. Oracle EXPRESS multidimensional
Web browser
STATINFO
Oracle Discoverer
META
Subject Matters
Consistent Dataviews
Indicators
Dimensions,Nomenclatures,Hierarchies
Stat. Terms,
ConceptsDescription of Surveys
Meta Database
THE DW STRUCTURE
Data Warehouse ApplicationsData Warehouse Applications
STAT-STAT-INFOINFO
METAMETA
DW DW METAMETA
DATA DATA LOADERLOADER
MDB MDB CRECRE
Users: Statisticians
IT Staff
Conclusions of the Meta Data Driven Systems’ Usage
Advantages• Less highly qualified
expertise
• Less mistakes
• Faster development
• Unified solution
• Fully described data
• Data & meta data in the same time
Problems• The meta data system
becomes complicate
• Good meta data checking
• Distributed meta data collection (co-ordination or workflow needed)
• Not so easy to develop a meta data driven system