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NEW ISSUE: What is a logical address?

From: Anish Karmarkar <Anish.Karmarkar@oracle.com>
Date: Mon, 21 Feb 2005 11:29:54 -0800
Message-ID: <421A36B2.6050309@oracle.com>
To: public-ws-addressing@w3.org

Title:
What is a logical address?

Description:
In the core spec [1], it is stated that the [address] property and the 
wsa:Address EII may be a logical address for the service endpoint.
The last published WD [2] described wsa:Address as a 'logical address or 
identifier'. The word 'identifier' was removed in the current ed. draft. 
I'm not sure if this was an oversight or an effect of resolving issue 1.

Justification:
The core spec uses the term "logical address" without explaining what it 
means. I have been getting some questions from our implementation team 
as to what a logical address means and how it is used. AFAIK, this is a 
new term that is being introduced without any explanation or definition 
of the term.

Target:
Core

Proposal:
I understand this term to mean that the URI in the [address] property 
identifies the service endpoint. I know this WG has been a little shy 
with the term "identifier", but I don't think there is an issue with 
using URIs as identifiers -- thats what they are meant for. In resolving 
issue 1 we have already stated that EPRs are not identifiers, so the 
next question that comes to mind is -- what is it that identifies a 
service endpoint? In calling the [address] property the service endpoint 
identifier, both the questions of "what is a logical endpoint?" and "how 
do I identify a service endpoint?" are answered. Using my interpretation 
of 'logical address', I would like to put forward the following strawman 
proposal:

In section 2.1 --

Replace:
  [address] : URI (mandatory)
     An address URI for the endpoint. This may be a network address or a
     logical address.

with:
  [address] : URI (mandatory)
     An address URI that identifies the service endpoint and may be
     deferenceable.

In section 2.2 --

Replace:
  /wsa:EndpointReference/wsa:Address
     This REQUIRED element (of type xs:anyURI) specifies the [address]
     property of the endpoint reference. This address may be a logical
     address for the service endpoint.

with:
  /wsa:EndpointReference/wsa:Address
     This REQUIRED element (of type xs:anyURI) specifies the [address]
     property of the endpoint reference. This address identifies the
     service endpoint and may be dereferenceable.


This is only a strawman, so please do send suggestion for changes.

-Anish
--

[1] http://dev.w3.org/cvsweb/~checkout~/2004/ws/addressing/ws-addr-core.html
[2] http://www.w3.org/TR/2004/WD-ws-addr-core-20041208/
Received on Monday, 21 February 2005 19:36:38 GMT

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