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This is a basic implementation of HL7 protocol in python.

HL7LLPServer and HL7LLPClient modules implement the simplest LLP over
TCP/IP, i.e. messages are sent over the wire preceded by start of
block character and followed by an end of block character. No CRC and
length information are added. 

message module implement v.2.4 message using a hierarchical structure
so that the internal storage reflects message structure.

segment module includes a simple class to manage segment, they are
basically list with some function.

segments module contains the implementation of some segments deriving
from segment class, this is basically an example of use of the segment class.