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characters for a TNS connect descriptor

DB 19.21

Found a tnsnames.ora having a TNS connect descriptor with a special character in it.

Made me wonder what would the purpose of that, and if that character is even allowed for a working TNS connect descriptor.

According to this document ( https://docs.oracle.com/en/database/oracle/oracle-database/18/netrf/syntax-rules-configuration-files.html#GUID-D7E40356-7476-49E1-B0A8-5664DCE47E2F ) - Section " 3.3 Network Character Set for Keywords " ??

the character concerned is allowed to be used, but then it says the comma is as well, and just that one is a separator. Like using

DB,DB1=...

Where both DB and DB1 are defined as being the same connection string.

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