HL7 Version 2
Hl7 v2 is the most widely used healthcare interchange format. Messages are sent in response to trigger events. Messages comprise a set of segments, defined using an abstract message syntax table. Segments contain fields and fields contain components; components may contain sub-components, which are separated by delimiters. Segments are specified in segment definition tables. Z-segments are locally defined. Data types are the basic building blocks in each element. Some are simple, others are complex. Codes are defined using tables.
KeywordsHL7 v2 Trigger event Segment Abstract message syntax table Field Component Sub-component Data type Delimiter Message header (MSH) Event type (EVN) Patient identification details (PID) Patient visit (PV1) Request and specimen details (OBR) Result details (OBX) Z-segment Coded no exceptions (CNE) Coded with exceptions (CWE) HL7 tables
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