iNTERFACEWARE™ Inc.

Level 3

Fields may consist of the sub-fields (also defined as composites). So, the third level of delimitation will be between the sub-fields in the field. The delimiter can be either permanently defined in the character column of the table above or can be taken from message header (position 4 for HL7). For HL7, it will usually always be '^', but some legacy implementations may use different characters.