Create Business Rule to rename Document_Xid - Urgent

Hello,


We have a requirement where we want the filename of the pdf in the Document to be renamed as below format:

EMEAP_OTMINV_<SERVPROV>_<SERVPROV Inv Number>_<Seq Number>_<Year>.pdf

We want to have the seq Number generate if there is a correction invoice sent to the OTM.

For Ex: Invoice Number : 12345 (Original) filename would be
CONSTANTVALUE_<SERVPROV>_<SERVPROV Inv Number>_0_Year>.pdf
Corrected Inv : 12345
CONSTANTVALUE_<SERVPROV>_<SERVPROV Inv Number>_1_Year>.pdf

Can someone please help me on this requirement as I am new to OTM.

Thanks
Rahul