SDMX Metadata Common Vocabulary Status of project and issues (2004-2005)

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SDMX Metadata Common VocabularyStatus of project
and issues (2004-2005)
Statistical Data and Metadata Exchange
Marco Pellegrino Eurostat Marco.Pellegrino_at_cec.eu.
int
Denis Ward OECD Denis.Ward_at_oecd.org
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Overview

• SDMX Metadata Common Vocabulary
• Background
• Objectives and benefits of MCV
• Status of the project
• Expected benefits and use

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Terminology problems...
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Starting point

• No universally accepted metadata framework
• Semantics is important to interoperation-
  registries contain related and sometimes
  overlapping information- data must be kept
  updated and synchronized with a minimum effort
• Common understanding on meaning of- general
  concepts (metadata, quality,)- basic atomic
  metadata components

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Components of International Standards
BUSINESS MODELS
SEMANTICS (content)
SYNTAX (e.g. XML)
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Metadata Common Vocabulary

• Ultimate goal of project to develop a common
  understanding of standard metadata items focusing
  on descriptions of statistical concepts and
  methodologies used by statisticians in the
  collection, processing and dissemination of
  statistical data.
• Immediate objective to develop a Metadata
  glossary of those standard components, consistent
  with existing international standards and with
  terminology being used within SDMX organizations,
  other international / national agencies and
  related projects.

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Main references for standardisation

• ISO/IEC 11179, part 4 (Formulation of data
  definitions)
• Recommendations for constructing definitions for
  data and metadata
• ISO/IEC 11179, parts 1 and 3 (Metadata registry)
• Definition of main metadata items
• Quality glossaries
• UN and UN/ECE-CES methodological documents and
  glossaries (on metadata modelling,
  classifications, data editing,)
• SDMX documents (Gesmes/TS users guide, ISO
  framework)
• Definitions of main items for data-metadata
  exchange

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Tentative classification of MCV terms(draft 3rd
public release, April 2005)
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Metadata Standard Components
Administrative, Sources
Concepts, coverage, definitions
Standards
Methodology (collection, compilation,...)
Quality assessment
Metadata elements describing different elements
of statistical production cycle
Unambiguous accepted definition of metadata
elements located in a glossary comprising the
Metadata Common Vocabulary
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Fields of MCV glossary

• Title (mandatory)
• Definition (mandatory)
• Context for the definition (optional, but widely
  used)
• Definition source (mandatory)
• Links to related terms within the glossary
  (optional)
• URL to more detailed information (optional)

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Reference Metadata
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Accuracy
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Expected benefits and use

• The use of MCV terminology would
• support standardisation and consistency of
  metadata compiled within each institute, when
  associated to SDMX standards and key family
  descriptions
• Facilitate comparisons across geographical
  entities
• Facilitate mapping of different metadata systems,
  as it can be used independently from any specific
  metadata model

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Metadata Common Vocabulary

• For more info
• SDMX http//www.sdmx.org
• OECD http//cs3-hq.oecd.org/scripts/stats/glossar
  y/index.htm
• CODED http//forum.europa.eu.int/irc/dsis/coded/i
  nfo/data/coded/en.htm
• CIRCA http//forum.europa.eu.int/Public/irc/dsis/
  metadata/library

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Thanks for your attention
Marco Pellegrino Eurostat Marco.Pellegrino_at_cec.eu.
int
Denis Ward OECD Denis.Ward_at_oecd.org