How to add Additional fields in ERP PR's XML file while transferring to SRM

Hi Guru's,

We have a requirement to transfer ERP Purchase requisition to SRM System using SOA services. Upon creation of PR in ERP, the PR will get transfer to

SRM as an XML file. Here middle ware is XI.

Please let me know if any customization is required to add additional fields of PR to XML file while transferring to SRM. If not, where can we handle this requirement.

Thanks in advance.

Thanks,

Vishnu.