[ebxml-dev] Presence of sequenceNumber element in Response message.

Hi! ebXML folks,
According to ebXML TRP spec "1.0" if the message is reliably sent, it
Must contain the Conversationid element which in turn has a sequence
Number element.
Consider a Situation where two Parties are exchanging some services,
example Party A and Party B

If Party A  initiates the conversation ,
then in the request message following elements appear
MessageID
ConversationID
SequenceNumber

Now the 
Party B responds to Party A  , while responding wether the Sequence
Number element must be present or not. If present wether it can be
incremented on the response end.


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