ESCWA SDMX Workshop Session Reference Metadata and Metadata

ESCWA SDMX Workshop Session: Reference Metadata and Metadata Structure Definition © Metadata Technology

Session Objectives • At the end of this session you will: – Know the SDMX model of a metadata structure definition – Understand the techniques to identify the structure of metadata – Identify the concepts in a simple metadata set – Be able to develop simple metadata structure definitions using SDMX tools © Metadata Technology

Reference Metadata • We have seen how data values are limited to where they belong – Series key (usually qualified by time) • Data attribute values are limited in where they belong – – Observation value Series key Group key Data set • Metadata is everywhere, but – it must be metadata about “something” • what is the “something” • how is it identified – it comprises concepts and how are they structured • The Metadata Structure Definition answers these questions • Advance release calendar is only one possible example © Metadata Technology

Metadata Structure Definition (MSD) Report Structure Metadata Structure Definition can comprise the specification of one or more report Target Metadata Report Concept takes semantic and context from Metadata. Attributes Metadata concept defined in can have hierarchy definition of format and permitted values can have hierarchy © Metadata Technology Concept Scheme Format and Permitted Value List

Metadata Structure Definition one or more Metadata Report one or more report for Metadata Target one or more Concept Metadata Attribute Identification elements of target object Target Object Representation Noncoded Coded Code List © Metadata Technology Noncoded Concept Scheme Organisation Scheme Code List Category Scheme

MSD: Target Object Metadata Target one or more Target Object Identification elements of target object Identifiable Object © Metadata Technology Constraint Key Descriptor Data Set Report Period

SDMX and Quality Frameworks • Examples – IMF SDDS – Eurostat – ILO – FAO © Metadata Technology

IMF Special Data Dissemination Standard (SDDS) © Metadata Technology

Eurostat Euro-SDMX Metadata Structure (ESMS) © Metadata Technology

OECD. STAT Reference Metadata Example © Metadata Technology

MDG Reference Metadata Example © Metadata Technology

Exercise © Metadata Technology