Subj : SEEN-BY
To   : All
From : Paul Hayton
Date : Mon Apr 01 2019 12:15 pm

Hi all

I'm just following up a chat I had with Mark and Al in the BBBS Support echo
concerning SEEN-BY lines

Mark is saying that Mystic SEEN-BY lines may be incorrect in that at the
start of each line he says there should be a reference to the NET like this
example he gave.

[snip]

@SEEN-BY: 1/1 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
@SEEN-BY: 1/116 117 118 119 120 121 122 123 124 125 127 128 129 130 131 133
134
@SEEN-BY: 1/135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
151

[snip]

whereas Mystic is creating SEEN-BY likes this.

[snip]

@SEEN-BY: 1/1 100 101 102 103 104 105 106 107 108 109 110 111 112 113
114 115
@SEEN-BY: 116 117 118 119 120 121 122 123 124 125 127 128 129 130 131
133 134
@SEEN-BY: 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149
150 151

[snip]

in both examples all nodes are members of NET 1

When James is back on deck I was going to feed this info back to him but
wanted to do due diligence first and find FTSC docs that explain this
requirement.

At the moment I can't find anything except in FTS-0004 where there's a section
about SEEN-BY but no mention of the need to start each line with a NET/NODE
combo.

[snip]

Seen-by Lines

              There can  be many  seen-by lines  at the  end of Conference
              Mail messages,  and they  are the real "meat" of the control
              information. They  are used  to  determine  the  systems  to
              receive the exported messages. The format of the line is:

                          SEEN-BY: 132/101 113 136/601 1014/1

              The net/node  numbers correspond  to the net/node numbers of
              the systems having already received the message. In this way
              a message  is never  sent to a system twice. In a conference
              with many  participants the  number of  seen-by lines can be
              very large.   This line is added if it is not already a part
              of the  message, or added to if it already exists, each time
              a message  is exported  to other systems. This is a REQUIRED
              field, and  Conference Mail  will not  function correctly if
              this field  is not put in place by other Echomail compatible
              programs.

[snip]

Can someone point me to where I can reference this need and provide any
commentary about this subject please?

With thanks.

Best, Paul

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