in DB2 package mean different , compiled sql statements stored in it , that is package in DB2.
But in Oracle combinations of stored procedures & functions
if you want to convert Oracle package into DB2 , create stored procedures & functions seperatly by using DB2 Development Centre ( for DB2 UDB V8 ) , Db2 stored procedure builder ( in DB2 UDB V7)
from which version or environment of Oracle R U migrating , what is your DB2 version & environment.
based on it I can give some tips & thoughts
Thank You