Re: (dsssl) Hypothetical question on namespaces

[David Carlisle <davidc@xxxxxxxxx>]

> #t = subset?(SGML XML) 
>    and 
> #t = subset(XML XMLnamespace)
>  
>     but
> 
> #f = subset(SGML XMLnamespace)
>   

your second premise is wrong (backwards in fact). If the subset?
relation is defined by X is a subset of Y if every X-application is a
Y-application then
XML is a subset of XML as given a suitable SGML declaration, every SGML
parser is an XML parser

but XML namespaces is an extra layer of processing, so it is not true
that every XML application is an XMLnamespace application. Rather it is
the other way round. Every XMLnamepace application is an XML one.

David

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