[jdev] Re: VTD-XML version 1.6

[Peter Saint-Andre]

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Jimmy Zhang wrote:
> Excuse my ignorance, after read your examples a bit more, I had only
> more questions...
> why not exchanging well-formed XML messages for each request and
> response like SIP??

Because SIP sucks?

But seriously, Jabber/XMPP technologies were designed this way from the
very beginning (when Jeremie Miller invented them in 1998). It's a bit
late to change things now.

> for some reason this partial conversation style of XMPP looks pretty
> unnatural?? 

Heh, I chatted with Tim Bray about this at a conference a few years ago
and he said "well, I wouldn't have designed it that way" -- i.e., he
would have sent complete documents, rather than dreaming up something
"unnatural" like XML streams. So yes, streaming XML seems unnatural to
people who are used to thinking of XML as a document format. Yet there
is no really good reason why a message should be a full document, is there?

> Why is XMPP this way??

Because. :P

But it turns out that streaming XML has some inherent benefits, one of
which is that you don't have to create a new parser instance every time
you want to send, receive, or route a message.

Peter

- --
Peter Saint-Andre
Jabber Software Foundation
http://www.jabber.org/people/stpeter.shtml

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