Payroll Interface for ADP Global Payroll V2 : XML/XSLT/XSL Template

Summary:

Requirement: Working on 'Payroll Interface for ADP Global Payroll V2' extract. Requirement is to extract limited attributes/columns/fields.

Challenge: Oracle-delivered extract cannot be customized.

Solution: Only option available is using a template. Extract calls a delivered Oracle report(Path:/Shared Folders/Human Capital Management/Payroll Interface/ADP Global Payroll Interface) that prints output data in XML format.

Assistance Needed:

Never worked on the XML/XSL template and unsure how to work on this template to restrict the data to only specific attributes/columns as per the requirement.
Can someone please provide me the Oracle guides/documents/oracle_doc_id or steps to begin and if possible, example template for reference.