A.1 INTRODUCTION
The HL7 specifications were prepared using a data dictionary database. Certain outputs from that database are included in the chapters that define the abstract messages. These outputs list the data fields and field notes associated with a segment. Other Data Dictionary outputs are included here to comprise appendix A. These include:
a list of the message types that comprise the HL7 protocol
a list of the segment IDs and segment names
a list of each data element organized alphabetically by name
a list of the IDs and names of all tables of coded values
a cross reference of table IDs vs. data element names
a list of the contents of each table
a list of all data element names.