Are different versions of the same event unique?

[Alasdair Allan]

> I'm inclined to agree so I've asked Scott to provide a summary of why he thinks this might be an issue.

They are syntactically different representations of the same event. The IVORN is the event ID, not the message ID.

> A possible scenario is a subscriber who receives both v1.1 and v2.0 and does nothing with the XML but just strips out information from the event, in which case they will have handle duplicates?

That's their problem, they should have resolved the IVORN.

Al.