Development of Metadata System at Croatian Bureau of Statistics

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Development of Metadata System at Croatian Bureau
of StatisticsPresented by Maja Ledic Blaževic,
Project leader of metadata development
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Contents

• Development of the metadata system
• Metadata methodology

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Development of Metadata System

• Mapping metadata systems to METANET Reference
  Model TM
• PC-Axis Macrometa 2.0
• CROMETA 1 (first metadata system at CBS)
• Result CROMETA 2 model
• extended reference model including necessary
  concepts or characteristics from mapped models
• accompanying tool for browsing and maintaining
  metadata

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Development of Metadata System

• Methodology development
• mapping different metadata consumers models to
  Reference Model TM
• collection of metadata in CBS
• specifications and support for technical
  implementation
• Technical implementation
• conceptual design of metadata model
• physical implementation
• development of maintenance tool

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Metadata Methodology

• Metadata sections
• Studies and questionnaires
• Variables and measurements
• Classifications
• Publications
• Organisational structure
• History and version handling
• General metadata
• Processing and validation rules
• Access and authorization rules

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Metadata Methodology

• Extensions of Reference Model TM in CROMETA 2
• additional concepts and/or characteristics
• Hierarchical structures
• Organisation scheme - hierarchy of organisations
• Theme structure hierarchy of themes not
  mutually exclusive structures
• Questions in questionnaire - hierarchy in context
  of questionnaire (reuse)

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Metadata Methodology

• Status and Version Handling
• versions of metadata objects
• version number, validity period, predecessor,
  successor, status
• status of metadata object mandatory information
• Under development
• Released
• Authorised
• Frozen
• Archived
• Deleted
• dependence between status and version of metadata
  object

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Metadata Methodology

• General properties attributes of all metadata
  concepts,
• e.g. multilingual title and description
• General metadata concepts - applicable to any
  metadata object
• Keyword
• Footnote
• Title (official, short, medium, alternative etc.)
• Language
• Document
• Free-text characteristic
• Milestone
• Status

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Metadata Methodology

• Meta-metadata
• Organisation level institution, statistical
  division, statistical department
• User group type administrators, experts
• Privileges add, edit, delete
• Variable type - alpha variable, beta variable,
  gamma variable, time variable
• Cube availability - official, internal, private,
  etc.
• Compatibility compatible with Eurostat
  definition, not compatible with Eurostat
  definition, etc.

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Metadata Methodology

• Collection of metadata
• five appointed surveys studies and
  questionnaires, statistical objects and variables
• Program of Statistical Activities
  organisational structure, theme structure
• CROMETA 1 measurements, studies and
  questionnaires
• PC-Axis theme structure
• HR - organisational structure

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CROMETA 2 Model

• gt 170 concepts
• gt 230 tables

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CROMETA 2 Model
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Summary

• Present status
• ongoing collection of metadata
• development of section of processing and
  validation rules
• testing and feedback collection
• Future plans
• further adjustment/development of the model and
  maintenance tool
• building generators applications for
  generating programs for data processing based on
  metadata

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Thank you for your attentionPresentation
performed byMaja Ledic Blaževic, Senior IT
AdviserCentral Bureau of Statistics of
CroatiaTel. 385 1 4806257Fax 385 1
4806141E-mail majalb_at_dzs.hr