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   Re: [xml-dev] Partyin' like it's 1999

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Elliotte Harold wrote:

> Sean McGrath wrote:
>> 1) The lack of sane, simple roundtrippability. I read in some XML, I 
>> write it straight back out again. I loose stuff on the way. R u nuts? 
>> And you call this a machine processible data format:-)
> In my experience if you really care about anything you lose (CDATA 
> sections, entity references vs. characters, etc.), that's a serious 
> code smell that indicates a major flaw in the stuff. Yeah, the stuff 
> that comes out may not be as nicely formatted for humans reading it 
> with more or a text editor, but often even that can be fixed with 
> appropriate options on the serializer.
> I'm not sure exactly what this RIG thing you cited is, or what your 
> use case is, but after skimming the spec, my nose is going nuts. This 
> smells very bad. Why would anybody ever care about preserving 
> attribute order? Why forbid CDATA sections? And section 12.1, "XML 1.0 
> features that, if present in an instance, will cause RCF1 to RCF 
> conversion to fail" includes "Presence of control characters in the 
> U+0000 to U+001F range other than TAB (U+0009), CR (U+000D) and LF 
> (U+000A)." These are not XML 1.0 features. If these things show up the 
> document is malformed, irrespective of all the extra rules you're 
> piling on top of raw XML. There's something deeply wrong here. :-(

The use case here is transmitting XML-based messages from one service to 
another service on a Service Oriented Architecture and doing it in such 
a way that (a) it is possible to be sure that a message routed "straight 
through" has not been tampered with and yet (b) the XML is fully 
visibile - not a lump of attatchment goo - for the purposes of 
intelligent routing.

Equally important is the fact that an intermediating service can 
add/modify/delete content from the XML instance without doing damage to 
the untouched parts of the instance.




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