Re: WSA From

Couldn't the same thing be said about wsa:ReplyTo (or any other header) if 
the WSA spec doesn't disallow their use for other purposes?
-Doug




Mark Nottingham <mnot@mnot.net> 
Sent by: public-ws-addressing-request@w3.org
02/09/2006 02:54 PM

To
Mark Little <mark.little@jboss.com>
cc
Paul Fremantle <pzfreo@gmail.com>, public-ws-addressing@w3.org
Subject
Re: WSA From







Speaking just as me...

It sounds like there are a lot of potential use cases for From.

What's less than clear is whether they're compatible; i.e., if WS-Foo 
says wsa:From should contain a URI that corresponds to the MAC 
address of your ethernet controller, WS-Bar says wsa:From should 
contain a urn:uuid for your service (as we're already seeing from our 
friends from the North, apparently), and WS-Baz says it should be 
your IP address, how do you use these specifications in a 
"composable" fashion?

Of course, From could changed to allow more than one URI, but then 
how do you pick which one is the appropriate one? E.g., if I see 
three http:// URIs in there, which one is MY From?

Smashing a bunch of different use cases into one vague semantic 
bucket isn't interoperable; it's asking for trouble. I see no reason 
why these different cases can't specify different headers to contain 
the information they need; yes, WS-Addressing is one boat that they 
could hop onto on the way to standards paradise, but there are others.

Cheers,


On 2006/02/08, at 4:11 AM, Mark Little wrote:

>
> +1
>
> I don't see what it adds in removing it, but I can see what it 
> removes by removing it.
>
> Mark.
>
>
> Paul Fremantle wrote:
>> Hi
>>
>> I'd like to write in support of wsa:From.
>>
>> 1) A lot of mediation (SLA provision, security checks, etc) is 
>> based on who/where the message came from. From is useful for that.
>> 2) WSA makes WS-* much more "peer-to-peer". But knowing where a 
>> message comes from is a key part of that.
>>
>> For example we in Apache Synapse are allowing users to do custom 
>> routing based on wsa:From.
>>
>> Paul
>>
>> -- 
>> Paul Fremantle
>> VP/Technology, WSO2 and OASIS WS-RX TC Co-chair
>>
>> http://bloglines.com/blog/paulfremantle
>> paul@wso2.com <mailto:paul@wso2.com>
>>
>> "Oxygenating the Web Service Platform", www.wso2.com <http:// 
>> www.wso2.com>
>
>


--
Mark Nottingham     http://www.mnot.net/