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Refining the CDMS specification
Bruce Bannerman Australian Bureau of Meteorology e-mail: [email protected]
Co-Chair Expert Team – Climate Data Management Systems,Commission for Climatology
ET-CDMS, Geneva, 04-07 November 2014
Current Version of CDMS Spec
• Is intended to provide a strategic vision
• Refers readers to many other references
– Need to balance:• Self-contained stand-alone doc, versus• References to authoritative sources
• Sufficient detail is provided to:– support a primary evaluation of CDMS current state
capabilities
– commence business case, planning and IT architecture activities
2
Current Version of CDMS Spec
• Not sufficient detail to:
– Remove ambiguities in different WMO guidelines • e.g. rules on missing values
– commence software development
– describe use cases of how the CDMS is to be used
– describe how components are intended to interact
3
Work required for CDMS Spec
• Expand and refine each component. Ensure that it– contains the best information available
– is not ambiguous
– Describes the requirement in a clear, concise and consistent manner
– is stand alone and does not direct reader to other documents
– retains the lineage to the source document to facilitate maintenance of the spec, should the source change
– Contains relevant use cases and swim lanes to describe the intended use and inter-relation ship of the component(s)
– Contains sufficient technical detail to support IT development
4
Work required for CDMS Spec #2
• Define requirements for defining the source of data
– Formal NMHS data
– Informal data, e.g. Crowd Sourced data
• Climate Metadata– Ensure that Observations Metadata is covered by WIGOS
Metadata Standard• If not, Define Climate Profile of WIGOS Metadata Standard Review
WMO Core Profile of ISO 19115 Discovery Metadata
• Consider implications of CDMS Spec Climate Metadata
• Is a Climate Profile of WCMDP now required to cover Data Provenance Metadata and Observations Metadata linkages?
– Define what we want in Data Provenance Metadata5
Prioritise work
• Prioritise work on ‘Required Components’– Need to support:
• Developing Countries• CDMS Developers
• Therefore we will need early deliverables• How do we allocate and coordinate work?
6
Version Management
• Start with MS Word version of WMO No. 1131 used by WMO Editor
• Use:– MS Word 2010 (Windows)
– MS Word 2011 (Mac)
– Track Changes
• Version numbering– Use file naming convention
7