When you initialize Replication Agent using pdb_xlog init, it creates objects that support replication in the primary database.
See the Replication Agent Primary Database Guide for details.
Replication Agent for UDB installs SYBRAUJAR.jar and SYBTRUNCJAR.jar into the following directories:
On Windows, the files are installed in %DB2DIR%\SQLLIB\FUNCTION\jar\pds_username. %DB2DIR% is the path to the UDB installation, and pds_username is the name of the primary database user specified by the pds_username Replication Agent configuration parameter.
On UNIX, the files are installed in $HOME/sqllib/function/jar/pds_username. $HOME is the home directory of the UDB instance owner and the pds_username is the name of the primary database user specified by the pds_username Replication Agent configuration parameter.