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   Re: Namespaces !

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  • From: John Cowan <cowan@locke.ccil.org>
  • To: XML Dev <xml-dev@ic.ac.uk>
  • Date: Tue, 04 Aug 1998 10:51:01 -0400

Patrice Bonhomme wrote:

> The WD says: "The namespace prefix, unless it is xml or xmlns, must have been
> declared in a namespace declaration. The namespace prefixes xml and xmlns are
> reserved, and considered to have been implicitly declared."
>  1/ The example following this definition uses a NS declared after its use :
>         "<html:html xmlns:html='http://www.w3.org/TR/REC-html40'>"

The draft also says, "The namespace declaration is considered to apply
to the element where it is specified and to all elements within the
content of that element, unless overridden [...]."

That's "to the element", not just to its content.  The GI of an
element is part of it, so the example is conformant.

> We should have only one reserved name : "xml" !!!

All names beginning "xml" or "XML" or "xML" or whatever are
already reserved.

>         <book xml:ns="books"> <!-- the default NS is "books" -->
>           <title>Cheaper by the Dozen</title>
>           <!-- switch to "isbn" NS -->
>           <isbn:number>1568491379</isbn:number> ...

That won't work.  What *is* the "isbn" namespace?  You haven't
specified its URI anywhere.

John Cowan	http://www.ccil.org/~cowan		cowan@ccil.org
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

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  • References:
    • Namespaces !
      • From: Patrice Bonhomme <Patrice.Bonhomme@loria.fr>


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