Refining the CDMS specification

Bruce Bannerman Australian Bureau of Meteorology e-mail: b.bannerman@bom.gov.au

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

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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

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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

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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?

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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

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