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[xmlblaster] Some QOS Questions

As I'm figuring the ins-n-outs of xmlBlaster I'm trying to put together
a presentation on the topic.  I've posted the slides I have so far
concerning QOS at ftp://kalamazoolinux.org/pub/pdf/xmlBlaster.pdf  I'd
appreciate it if someone would take a look and offer their opinion on
the accuracy, although there isn't much there yet.

But I've come up with a few questions that the documentation seems iffy
about -

1 - Does the sender of the message actually set the "<sender></sender>"
tags or are these added when the message is recieved?

2 - Does the priority tags really have any effect?  On the order the
messages are delivered, etc...?

3 - On a published message the examples in XMLQoS show an XPATH
statement in the <destination> tags.  Is this actually used?  I though
XPATH queries were run against the keys of queued messages?
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