FENCED or NOT FENCED: This clause specifies whether the routine is considered "safe" to run in the database manager operating environment's process or address space.

The "$c/Client/Address" clause indicates the path in the XML document hierarchy where DB2 can locate the "zip" element.

As another example, Update 29 USES the COPY clause to only get the customer's address, and the RETURN clause to embed the modified address in a new "sendto" element.