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Excerpt

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Users can define their own local BUFR tables to adapt ecCodes to their own needs e.g. to use a local descriptor.

Warning
Please note: According to the WMO, the use of local tables in messages intended for non-local or international exchange is strongly discouraged.

Step-by-step guide

Users can define their own local BUFR tables to adapt ecCodes to their own needs e.g. to use a local descriptor.

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The local BUFR tables are stored in the following definitions directories:

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Try decoding the BUFR file "ikco_217.local.bufr" using bufr_dump. This file uses a local table version (localTablesVersionNumber=66).
Decoding should fail as ecCodes does not know about these descriptors.
Run the codes_info tool to find the location of the default definitions.
Now set ECCODES_DEFINITION_PATH to include the provided "mydefs" directory.
E.g.
export ECCODES_DEFINITION_PATH=`pwd`/mydefs:`codes_info -d`
Now see if ecCodes can decode the BUFR file.
Search the output of bufr_dump for the overridden unit "MyOwnUnits".
This was added as an example of a centre defining its own parameter attributes