PL/SQL den bpel i çağırma

You can create a PLSQL stored procedure to invoke your BPEL process and schedule it using DBMS_JOB (DBMS_SCHEDULER in Oracle 10g).
Read this http://www.oracle.com/technology/tech/webservices/htdocs/samples/dbwebservice/DBWebServices_PLSQL.html
and this http://www.oracle.com/technology/products/database/scheduler/index.html