Commerce XML (cXML) is a standard protocol for business transactions that isdesigned for business document transfers among suppliers, e-commerce hubs and procurement applications.

The cXML protocol uses XML to provide XML schemas for common transactions and allows various programs to validate and modify documents without knowing the document form. It is used for describing company details and transaction profiles, the content of catalogs, changed and original purchase orders (POs), deleted POs, responses to all these POs, and order confirmation and ship notice documents.