RE: "must appear only when"

[David Fischer <david@drummondgroup.com>]

If SequenceNumber is always present, it won't hurt anything, it just won't be
used in some cases (messageOrderSemantics="NotGuaranteed").

David Fischer
Drummond Group.

-----Original Message-----
From: Dan Weinreb [mailto:dlw@exceloncorp.com]
Sent: Tuesday, August 14, 2001 8:49 AM
To: ebxml-msg@lists.oasis-open.org
Subject: "must appear only when"


In line 890 (of Message Services Specification, Version 1, 11 May
2001), I found the phrase "must appear only when" to be slightly
unclear.

Does this mean "IF the-condition, THEN SequenceNumber MUST appear, but
IF NOT, we aren't saying anything about whether SequenceNumber might
appear or not" or does it mean "SequenceNumber MUST appear IF AND ONLY
IF the-condition is true" (where the-condition is "deliverySemantics
has a value of OnceAndOnlyOnce and messageOrderSemantics has a value
of Guaranteed")?

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