The bounds of the text, whether contiguous or not, over which the computation of the Assurance Token is computed using the defined methodology of computation and any relevant Assurance Token parameters; the "body" is either a transaction set (beginning with the ST and including all segments up to the first S2A segment, but excluding any S2S segment) or functional group (beginning with the GS and including all transaction sets up to the first S1A segment, but excluding any S1S segment
"This Assurance" is defined as from the "S" in S1A or S2A up to and including the data element separator preceeding the assurance digest
"Previous Assurance(s)" is defined as including the entire S1A or S2A segment and the entire SVA that follows the included S1A or S2A