Universal Business Language (UBL) is a royalty-free model of business document information in XML syntax. UBL was developed by Organization for the Advancement of Structured Information Standards (OASIS) to be as an entry point to electronic commerce for small and medium-sized business.

NES is cooperation among a group of countries and organizations to facilitate the practical use of electronic collaboration in the procurement chain, based on available international standards.

Universal Business Language (UBL) is a library of standard electronic XML business documents such as purchase orders and invoices. UBL was developed by an OASIS Technical Committee with participation from a variety of industry data standards organizations. UBL is designed to plug directly into existing business, legal, auditing, and records management practices. It is designed to eliminate the re-keying of data in existing fax- and paper-based business correspondence and provide an entry point into electronic commerce for small and medium-sized businesses.