EANCOM is an EDI data standard that has been adopted by M&S for its Electronic Trading Partner solution. The EANCOM® standard is an implementation guideline on the use of subsets of relevant UN/EDIFACT messages. This implementation guideline specifies in detail the use of the selected components of these UN/EDIFACT messages in order to support their electronic exchange between trading partners’ application systems for the selected information flows.
You can further information about the standard at the following location: http://www.gs1.se/eancom_2002/ean02s4/experts/index.htm