WS-Eventing issue

Hi everybody,

I'm new to this mailing list. I come from Germany, institute of
telematics at the University of Lübeck. I'm working with WS-Eventing and
got some problems while reading the specification. Recently I had talked
to Wu regarding to the missing wse:Identifier in the current working
draft (http://www.w3.org/TR/2010/WD-ws-eventing-20100805). Wu told me
that the wse:Identifier was removed because it is inconsistent with the
WS-Addressing principle that reference parameters should be opaque.
Instead of using wse:Identifier, the event source should provide an
unique subscription manager EPR for every event subscription.

First it would be useful if the foregoing information is emphasized
within the WS-Eventing specification. After reading the "2.4
Subscription Managers" section
(http://www.w3.org/TR/2010/WD-ws-eventing-20100805/#SubMgr) again,
together with Wu's background knowledge, the subscription manager
behaviour mentioned above would be clear. What's your opinion?

The method above works very well with one exception (may be I've not
understand the reasonable cause behind the subscription end message): if
an event source wants to quit a subscription by using a subscription end
message, no subscription manager EPR is given to indicate the terminated
subscription. If you take a look at the 2006' WS-Eventing submission, a
subscription manager EPR is transmitted (comparing
http://www.w3.org/Submission/2006/SUBM-WS-Eventing-20060315/#Subscription_End
with
http://www.w3.org/TR/2010/WD-ws-eventing-20100805/#SubscriptionEnd).
What's the reason for this modification? Should a subscription end
message only be sent when every subscription is terminated? Otherwise,
wow does an event sink know which subscription is terminated?

Thanks in advance for your hints und helps,

David Gregorczyk

-- 
Dipl.-Inf. David Gregorczyk
    Wissenschaftlicher Mitarbeiter


UNIVERSITÄT ZU LÜBECK
    INSTITUT FÜR TELEMATIK

    Ratzeburger Allee 160
    23562 Lübeck

    Tel +49 451 500 5386
    Fax +49 451 500 5382
    gregorczyk@itm.uni-luebeck.de

    www.itm.uni-luebeck.de

Received on Wednesday, 5 January 2011 10:15:09 UTC