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Development of Metadata System at Croatian Bureau of Statistics

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Title: Development of Metadata System at Croatian Bureau of Statistics


1
Development of Metadata System at Croatian Bureau
of StatisticsPresented by Maja Ledic Blaževic,
Project leader of metadata development
2
Contents
  • Development of the metadata system
  • Metadata methodology

3
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

4
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

5
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

6
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)

7
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

8
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

9
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.

10
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

11
CROMETA 2 Model
  • gt 170 concepts
  • gt 230 tables

12
CROMETA 2 Model
13
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14
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15
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

16
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
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