Also known as "ANSI X12" and "ASC X12," it is a protocol from the American National Standards Institute (ANSI) for electronic data interchange (EDI). X12 was the primary North American standard for defining EDI transactions. It merged with EDIFACT in 1997. See EDI.
A standard for Electronic Data Interchange (EDI) from the American National Standards Institute (ANSI) Accredited Standards Committee (ASC). X12 is popular in North America. The competing UN/EDIFACT international standard is predominant outside of North America. EDI standards specify data formats, character sets, and data elements. See also ANSI, EDI, standard, and UN/EDIFACT.