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Re: RE: Schema vs Schema-free (was: RE: XMLBinary Ch

• To: Bob Wyman <bob@w...>
• Subject: Re: RE: Schema vs Schema-free (was: RE: XMLBinary Characterization WG public list availabl)
• From: Rich Salz <rsalz@d...>
• Date: Tue, 13 Apr 2004 21:10:57 -0400 (EDT)
• Cc: 'Elliotte Rusty Harold' <elharo@m...>, 'xml-dev' <xml-dev@l...>
• In-reply-to: <00d401c421a7$3bfba8a0$650aa8c0@BOBDEV>

> 	I see your point, in the abstract, however, I can't help
> thinking that we should be able to assume more uniformity than you
> suggest.

Information hiding, coupled with extension points.  For example,
the exact format of my identification token may not be known to anyone
else, but I can put it into a WS-Security header because of the
xsd:any they have.  Outsiders just treat it as an opaque blob of XML;
my security system knows what to do with it.

I think this kind of thing will become more common, not less.

Parts of X.fws concern me -- I am thinking of the round-trip from
XML for something like <error-rate>.500</error-rate> going to a
local number, out via ASN.1/DER as an IEEE float, and back.  Along
the way it's all too likely to end up as .5, which will break my
digital signature -- and quite rightly, since trailing zero's are
semantically significant.

        /r$

--
Rich Salz                  Chief Security Architect
DataPower Technology       http://www.datapower.com
XS40 XML Security Gateway  http://www.datapower.com/products/xs40.html
XML Security Overview      http://www.datapower.com/xmldev/xmlsecurity.html

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