Oracle 23 introduces a new concept called ANNOTATIONS, which allows a database object to be amended with key/value pairs to provide contextual information to the application.

See https://oracle-base.com/articles/23c/annotations-23c#:~:text=Annotations%20take%20this%20a%20step,that%20is%20meaningful%20to%20us.
Annotation Grammar -> https://docs.oracle.com/en/database/oracle/oracle-database/23/sqlrf/annotations_clause.html#GUID-1AC16117-BBB6-4435-8794-2B99F8F68052