Windows might tell you that you can't open it, or in the worst case, you might encounter a XPF file related error message. Before you can open a XPF file, you'll need to figure out what kind of file the XPF file extension refers to.
A vendor, or a supplier, is a supply chain management term that means anyone who provides goods or services to a company or individuals. A vendor often manufactures inventoriable items, and sells those items to a customer. Typically vendors are tracked in either a finance system or a warehouse management system.
1 Providers, in Medicare terminology, include patient care institutions such as hospitals, critical access hospitals, hospices, nursing homes, and home health agencies.  Suppliers are agencies for diagnosis and therapy rather than sustained patient care, such as laboratories, clinics, and ambulatory surgery centers.