Replication Agent creates objects in the primary database to assist with replication tasks.
The value of the ra_admin_instance_prefix parameter is the prefix string used in all Replication Agent object names.
The value of the ra_admin_prefix_chars parameter is a list of the nonalphanumeric characters allowed in the prefix string specified by ra_admin_instance_prefix. This list of allowed characters is database-specific. For example, in Oracle, the only nonalphanumeric characters allowed in a database object name are the $, #, and _ characters.
Use the ra_admin command to view the names of Replication Agent transaction log components in the primary database.
See the Replication Agent Administration Guide for details on setting up object names.