[exprla-devel] RE: [xpl] Output mechanisms: SOAP intro

[reid_spencer <ras...@re...>]

--- In xpl-dev@y..., "Richard Anthony Hein" <935551@i...> wrote:
Jonathan,

Certainly SOAP is powerful.  Plus it's getting worked on by many 
groups,
including the Apache XML project.  I have no problems with SOAP, and 
it
would be my first choice at this point.  However, let's not confuse 
the
issue with XSL.  XSL isn't for components to communicate.  SOAP and 
XML-RPC
are.  Whatever the standard accepted by the community will be, and I 
am
betting on SOAP at this point, we should use of course.  SOAP will 
allow XPL
to talk to CORBA, COM and Java Beans.  It also will facilitate 
communication
between XPL objects if necessary, but I am not sure it will be.  Then 
again,
if we want COM, Beans, and CORBA to talk to XPL objects, then yes, it 
will
have to be wrapped in standard "envelopes" such as SOAP.

So, in the XPL programming context, making a SOAP envelope should be 
simple
as possible.  Some people however, have expressed concern over the 
fact that
SOAP requires that you make the document root of your document the 
SOAP
envelope.  Some people think that this degrades the document, by 
requiring
actual changes to the document.  Mind you, when the raw document is 
packaged
in the SOAP env. it's only then that it has to have changes, then 
when it's
opened on the receiving end you should be able to strip off the 
envelope and
have the normal document.  So I am not sure why there is so much 
concern
about this.

Kurt's misgivings are understandable.  How can we facilitate a 
security
model to protect against improper usage of the local objects?  I am 
hoping
that this issue is resolved soon before SOAP is widely accepted.  But 
I am
certain it can be overcome.  In the meantime, what should we do?  
Wait,
build a security model for XPL usage of SOAP, dump SOAP, or just 
trust it
will all be OK?

This question needs to be addressed before we start talking about how 
we are
going to facilitate communication between heterogeneous objects.

Richard A. Hein
  -----Original Message-----
  From: me@m... [mailto:me@m...]On
Behalf Of Jonathan Burns
  Sent: July 7, 2000 10:28 AM
  To: xpl@e...
  Subject: [xpl] Output mechanisms: SOAP intro



  Back a couple of threads ago, Richard and I were debating XPL 
Requirements
for output
  mechanisms or formats. XSL? Remote Procedure Calls?
  I mentioned SOAP partly because Kurt had expressed misgivings that 
it was
TOO
  powerful, providing access to local objects.

  Anyway, I've just found this nicely-written  introduction , on the
Microsoft developers'
  network site.

  The bottom line seems to be, that whatever will receive an http POST
message can
  be addressed via SOAP, and quite simply.



--

Jonathan Burns; saski@w...

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