Consolidated Revision Concordance List (RCL)


Last updated
Wednesday March 23, 2022
Maintained by
OIPC/Classification Standards and Development

The following is a list of all symbols impacted by Revision Projects in the May 1, 2022 release. Please refer to the CPC Notices of Changes for additional information regarding changes to the Scheme, Definition, and Concordance.


Note: the following table is a simplified Revision Concordance List for all Revision Projects published in the current release. Specific information relating to reclassification (e.g. information on administrative transfers or intellectual reclassification) can be found in the Notice of Change for each Revision Project.

Refer to the Corrigenda and Consequential Amendments to CPC Revision Projects for details on amendments to Projects after publication.

Please refer to the List of Deleted Symbols for information on all symbols which have ever been deleted from CPC.

RCL information is only available for projects published January 2017 and beyond.

New: Revision Projects which have not yet been finalised are available under "Ongoing (2017+)".
Update to CPC Project Numbering
As a result of system upgrades, as of the CPC 2022.05 release, the numbering system of CPC projects is changed from parallel numbering to serial numbering and an extra digit is added.
From 2013 to 2022.02, projects used a set of parallel numbering, e.g. RP0001, RP0002, MP0001, MP0002, DP0001, DP0002.
The new numbering is a single set of serial numbers with an extra leading digit, e.g. RP10001, DP10002, MP10003, MP10004, DP10005, RP10006 so that each project gets a unique number to eliminate any risk of confusion between projects of different types.
When finalising a project that was originally published with an old-style number, the old number is still used for convenience and clarity.

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