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   Re: [xml-dev] Can we treat XML elements and attributes as sets

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  • To: Elliotte Harold <elharo@metalab.unc.edu>, Michael Kay <mike@saxonica.com>
  • Subject: Re: [xml-dev] Can we treat XML elements and attributes as sets
  • From: Mukul Gandhi <mukul_gandhi@yahoo.com>
  • Date: Sun, 21 Aug 2005 07:17:21 -0700 (PDT)
  • Cc: xml-dev@lists.xml.org
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  • In-reply-to: <430877F5.50005@metalab.unc.edu>

Thank you Mr. Harold for your comments. I feel the
change you are proposing to the relevant text is
perfectly all right.

I wanted to express my gratitude to you, for your
excellent book "XML in a Nutshell".

Thanks!
Regards,
Mukul

--- Elliotte Harold <elharo@metalab.unc.edu> wrote:

> Looking at that particular paragraph right now (p.
> 63) it doesn't seem 
> precise enough. It should be clearer that it's
> talking about element and 
> attribute names rather than element and attribute
> instances, though I 
> suspect that can be gathered from context. That
> whole sentence about 
> "The URIs partition the element names and attributes
> into disjoint sets. 
> " could be deleted without losing anything.
> 
> The bit about the 1-1 relationship between
> namespaces and XML 
> applications is also too strong. It completely
> misses the existence of 
> numerous different XML applications that have no
> namespace, or that are 
> in the null namespace if you prefer.
> 
> I'd used an example of genuine mathematical sets a
> little earlier in the 
> chapter so I probably had sets on the brain when I
> wrote that. I'll see 
> if I can clean this up in the next printing. How
> about this:
> 
> Namespaces distinguish between elements with
> different meanings but the 
> same name by assigning each element a URI.
> Generally, all the elements 
> from one XML application are assigned to one URI,
> and all the elements 
> from a different XML application are assigned to a
> different URI. These 
> URIs are called namespace names. Elements with the
> same name but 
> different URIs are different kinds of elements.
> Elements with the same 
> name and the same URI are the same kind of element.
> Most of the time a 
> single XML application has a single namespace URI
> for all its elements, 
> though a few applications use multiple namespaces to
> subdivide different 
> parts of the application. For instance, XSL uses
> different namespaces 
> for XSL Transformations (XSLT) and XSL Formatting
> Objects (XSL-FO).
> 
> I think that eliminates most of the pretentious
> pseudo-math I sometimes 
> slip into.
> 
> -- 
> ´╗┐Elliotte Rusty Harold  elharo@metalab.unc.edu
> XML in a Nutshell 3rd Edition Just Published!
> http://www.cafeconleche.org/books/xian3/
>
http://www.amazon.com/exec/obidos/ISBN=0596007647/cafeaulaitA/ref=nosim



		
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