As xfy natively handles XML, XML data on xfy is always loss-less regardless of they are in file, on wire, or on memory. Unlike on some of the Office Suites which do "exporting to/importing from in XML format" upon I/O, a user is free from the popular threat that "you may lose some information when you save your document in this format".
Documents in reliable data format which is built on open standards changes the value of information.
Documents in structured data format based on open standard brings great leverage into data processing.