[Ietf-not43] XML-RPC for an information service?

[Andrew Newton]

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Stephane Bortzmeyer wrote:
> 
> > I think I would be more supportive of a SOAP standard.
> 
> Could you explain why? A good explanation would be a proposal using
> SOAP, with features that cannot be done in XML-RPC (for those who
> never tried SOAP or XML-RPC, <summary level="rough">SOAP is a superset
> of XML-RPC</summary>).

Why SOAP over XML-RPC?
1) Dave Winer has even moved on.  He co-authored the first SOAP spec.
2) XML-RPC is tied to HTTP (as is SOAP 1.0).  To understand why the
firewall-bypass protocol is a bad idea, read RFC 3205.
3) XML-RPC is copyright Dave Winer, with a fairly liberal copyright. 
SOAP 1.2 will be a W3C spec.  That makes some people a little more
comfortable (and, I hate to say it, even me).
4) SOAP implementations are available from open source good guys and the
likes of enterprise solutions providers such as IBM, MicroSoft, BEA,
etc.

However, I don't think it is right of us to dismiss your idea at least
without a proper explanation.  I had to think about it some more to
actually get an answer I felt comfortable with.

Both XML-RPC and SOAP are abstraction layers intended to divorce the
"business logic" programmer of the murky details of the layers
underneath.  However, what we are proposing also involves the use of DNS
SRV or NAPTR records to a greater extent than can be found in most
library implementations.  This means the implementer will need a fair
bit of knowledge about the total solution anyway.

In addition, both XML-RPC and SOAP 1.0 seem to violate RFC 3205.  This
isn't good.  While there is a SOAP to BEEP spec that could get around
this, I would bet you'd be hard pressed to find an implementation of it
that suits your needs.  This also eliminates your ability to plug-in the
underlying stuff and just go.

-andy
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