PH> Mark is saying that Mystic SEEN-BY lines may be incorrect in that at PH> the start of each line he says there should be a reference to the NET PH> like this example he gave.
PH> When James is back on deck I was going to feed this info back to him PH> but wanted to do due diligence first and find FTSC docs that explain PH> this requirement.
PH> At the moment I can't find anything except in FTS-0004 where there's a PH> section about SEEN-BY but no mention of the need to start each line PH> with a NET/NODE combo.
PH> Can someone point me to where I can reference this need and provide PH> any commentary about this subject please?
Seen-by lines are the focus of EchoMail distribution control information. They are used to determine which addresses (systems) have received messages. There can be as many seen- by lines as required to store the necessary information.
Seen-by lines consist of "SEEN-BY:<space>", followed by a list of net/node numbers corresponding to the systems which have received that message. The net/node number of each system to which a message is exported is added to the seen-by lines at the time of export.
There shall be exactly one set of seen-by lines in a message. Seen-by lines:
- Shall follow the origin line.
- Shall begin with the nine character literal: _
SEEN-BY:<space>
- Shall contain a list of net/node numbers.
- Shall be no more than 80 characters long including the required literal.
The complete lines might look like:
The list of net/node numbers:
- Shall identify at least one address. "Blank" seen-by lines shall not be transmitted.
- Shall be sorted in ascending net/node order.
- Shall not contain repeated node numbers.
- Shall use only "2D" net/node notation.
- May use short form address notation where a net number is listed once on any one line. These 2 lines are equivalent:
Some implementations insert a Ctrl-A (0x01) immediately preceding the Six months after adoption of this document the ^ASEEN-BY: format shall be processed equally with the when either occurs in received packets. _
The critical phrase is: "May use short form address notation where a net number is listed once on any one line."
My interpretation is that the net number must be listed at least once on any one SEEN-BY line.
