Message Conventions
LAN/WLAN Data Export
2-4 Efficia CM Series Data Export Guide
Block Format
HL7 messages are enclosed by special characters to form a block. The format is as
follows:
<SB>ddddd<EB><CR>
where:
<SB> = Start Block character (1 byte). The ASCII vertical tab character <VT>, for example,
<0x0B>. Do not confuse this with the ASCII characters SOH or STX.
ddddd = Data (variable number of bytes). This is the HL7 data content of the block. The
data can contain any ASCII characters and the carriage return character, <CR>, as a
delimiter of individual message segments. UTF-8 encoding is used for languages that
cannot use ASCII characters.
<EB> = End Block character (1 byte). The ASCII field separator character <FS>, for
example, <0x1C>. Do not confuse this with the ASCII characters ETX or EOT.
<CR> = Carriage Return (1 byte). The ASCII carriage return character, for example, <0x0D>.
Delimiter Characters
The following characters are used to construct a message:
Segment Data Fields
Each message segment description contains the following data fields:
Character Description
| Field Separator. Separates two adjacent data fields within a segment.
^ Component Separator. Separates adjacent components of data fields where
allowed.
& Subcomponent Separator. Separates adjacent subcomponents of data fields
where allowed.
~ Repetition Separator. Separates multiple occurrences of a field where allowed.
\ Escape Character. Escape character for use with any field.
Character Description
Seq Sequence number of the field within the segment. Since an Efficia monitor does
not use all possible fields in the HL7 standard, the sequence numbers are not
always consecutive. This document shows only the fields that are included in
the messages.
Field Descriptive name for the field.
Description Data field description.
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