[regrep4] Align susbcription/notification with Web Services Notification(WSN)

Team,

The WSN specs:

<http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=wsn#technical>

are now approved as OASIS standard.

I would like to propose that we align the subscription/notification 
feature in RegRep 4 with these specs. The changes would have the 
following high level implications:

    * Eliminate several types and elements defined in rim.xsd
    * Eliminate NotificationListener*.wsdl files
    * RegRep implementations would need to implement or otherwise
      provide the following interfaces defined in
      <http://docs.oasis-open.org/wsn/bw-2.wsdl>:
          o NotificationProducer
          o PullPoint
          o SubscriptionManager
    * RegRep clients wishing to get notified would need to implement the
      following interfaces defined in
      <http://docs.oasis-open.org/wsn/bw-2.wsdl>:
          o NotificationConsumer

While this is a big change I think it makes sense to align with this 
standard because:

    * Aligns us with an approved standard
    * Reduces our spec content to possibly just profiling WSN specs
    * Provides richer more extensible functionality than we currently have

Please share your thoughts on this proposal.

Thank you.

-- 
Regards,
Farrukh

Web: http://www.wellfleetsoftware.com