Which parameters are in a Business Event parameter list

Dear all,

Are there any default parameters available when I add a subscription to a seeded Business Event in eBS?

Eg, I added a custom subscription to business event oracle.apps.per.api.assignment.update_emp_asg. This start a custom function whic inserts a record in my xx_table.

Unfortunately I am not able to see which assignment record caused the event to occur.

I know that parameteres can be found with finction'getvalueforparameter()', but how do I know which parameters are available by default?

Thanks in advance for your help.

Regards,

Wilro