The document discusses healthcare EDI and the X12 standard. It defines EDI as electronic data interchange that allows businesses to exchange standardized data instead of paper. X12 is the standard developed by ANSI for electronic data interchange across businesses. The X12 standard defines transaction sets, loops, and data segments for exchanging things like claims and invoices electronically. It provides an example of an 837 transaction following the X12 format with various required data elements.