Transcript ESCWA SDMX Workshop

ESCWA SDMX Workshop
Session: Reference Metadata and
Metadata Structure Definition
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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
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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
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Metadata Structure Definition (MSD)
Report Structure
Metadata
Structure
Definition
can comprise the
specification of one
or more report
Target
Metadata
Report
Concept
concept defined in
Concept
Scheme
can have
hierarchy
takes semantic and
context from
MetadataAttributes
Attributes
Metadata
definition of format
and permitted values
can have
hierarchy
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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
Representation
Noncoded
Noncoded
Coded
Coded
Concept
Scheme
Code
List
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Organisation
Scheme
Code
List
Category
Scheme
MSD: Target Object
Metadata Target
one or more
Target Object
Identification
elements of target
object
Identifiable
Object
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Constraint
Key
Descriptor
Data Set
Report
Period
SDMX and Quality Frameworks
• Examples
– IMF SDDS
– Eurostat
– ILO
– FAO
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IMF Special Data Dissemination Standard (SDDS)
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Eurostat Euro-SDMX Metadata Structure (ESMS)
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OECD.STAT Reference Metadata Example
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MDG Reference Metadata Example
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Exercise
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