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sWG-CMC: Sub-group on CMCs and the DimVIM
CCL summary
General information
CCL members
CCL publications and bibliography
Presentation by Dr Sacconi at the 24th meeting of the CGPM
CCL working groups
Recommended values of standard frequencies
CCL key comparison portfolio
Photographs of the CCL
Key comparisons
DimVIM: Multilingual CMC classification scheme
Open access
CCL documents
CCL-CCTF documents
CCL-WG documents
Restricted access  
CCL working documents
CCL-CCTF documents
CCL-WG documents
MePWG documents
Direct access

Task description:
  • to establish and maintain lists of service categories (DimVIM) and, where necessary, rules for the preparation of CMC entries (DimVIM Guide);


  • to agree on detailed technical review criteria;


  • to coordinate and, where possible, conduct inter-regional reviews of CMCs submitted by RMOs for posting in Appendix C of the CIPM MRA;


  • to provide guidance on the range of CMCs supported by particular key comparisons;


  • to identify areas where additional key and supplementary comparisons are needed; and


  • to coordinate the review of existing CMCs in the context of new results of key and supplementary comparisons.
Chair: O. de Oliveira, INMETRO
Members: RMO TCL chairpersons
DimVIM: CMC classification scheme (multiple languages)