Re: [Gnu-arch-users] Re: File-tpye plug-in architecture for Arch?

[Tupshin Harper]

Tom Lord wrote:

>    > From: Tupshin Harper <address@hidden>
>
>    > DTDs can't handle this level of specifity, but XSDs can. <soapbox>dtds 
>    > suck...should be deprecated in all applications...down with dtds</soapbox>
>
> So, formally, are XSDs turing complete?
>
> -t
>
>  
Absolutely not, unfortunately. I would certainly prefer a validation 
language that was. I'm not trying to make any grand claims that XSDs 
could be proven to validate to arbitrary domain specificity any 
conceivable format restriction. In fact, the opposite claim is fairly 
easy to prove. All I'm saying is that, for practical purposes, XSDs are 
powerful enough to restrict a reasonable domain problem (like office 
document representation) such that any conforming XML file that is not 
handled by the application can reasonably be considered a bug in either 
the application or in the XSD. This should be considered particularly 
true since the OO xml format is destined to be a cross-application 
interoperability format.

-Tupshin