What do all of the HL7 segment structure table headers mean?
问题 For example, the OBR segment reference table from here has the following headers: SEQ LENGTH DT OPT RPT/# TBL# NAME Here are my observations: SEQ seems fairly self-explanatory: It's the field number in the segment. Things like OBR.1 , OBR.2 , OBR.3 , etc. LENGTH looks fairly straightforward too: It's the length of the data. But some of them are 0 ? DT looks like data type. Things like SI , EI , ST , XCN , ID , NDL , etc. NAME is also self-explanatory: It's the full name of the field. Here are