Re: Revised ID Needed for draft-ietf-opes-iab-04?

Alex,

both examples look good to me. Minor comment inline.

>    The above concerns call for making notification optional. The OPES
>    architecture allows for an efficient and meaningful notification
>    protocol to be implemented in certain OPES environments.  For
>    example, an OPES callout server attached to a gateway or firewall may
>    scan outgoing traffic for signs of worm or virus activity and notify
>    a local Intrusion Detection System (IDS) of potentially compromised
>    hosts inside the network. Such notifications may use OPES tracing
>    information to pinpoint the infected host (which could be another
>    OPES entity). 

Although I believe to understand the intent of using the term "host" 
here, I'm wondering wether it might be easier to understand if we talk 
about a "server" in this example. I had to read the example twice to 
understand that the "host" you're talking about is a content source 
rather than the content consumer. But it might just be me :)



>    Another environment where efficient and meaningful notification using
>    OPES tracing is possible are Content Delivery Networks (CDNs).  A CDN
>    node may use multiple content adaptation services to customize
>    generic content supplied by the content producer (a web site). For
>    example, the node may insert advertisements for client-local events
>    or services.  The node itself may not understand specifics of the ad
>    insertion algorithm implemented in OPES callout servers.  However, it
>    may use OPES trace to notify content producer about the number of
>    certain advertisements inserted (i.e., the number of "impressions"
>    delivered to the customer) or even the number of ad "clicks" the
>    customer made (e.g., if the node hosts content linked from the ads).
>    Note that OPES services may not have enough information to contact
>    the content producer directly in this case.

The last sentecne could be explained a little more (e.g. what 
information might be missing etc.).

Thanks,
   Markus