xml-dev - Re: why do namespaces have such a bad rep [4]

[james anderson <James.Anderson@mecom.mixx.de>]

with consistent and complete support for namespaces, the identification
of token names would not be "automagical", you would have the means to
express the correspondence.

that's why i've kept my coffee table: when we're already busy with the
coffee and cake, and the next guests show up with the champagne, i don't
need three arms.

Steven R. Newcomb wrote:

> [James Anderson <James.Anderson@mecom.mixx.de>:]
>
> > i'm concerned about the case were i want to get at [the base
> > architecture's parameter entities], not be isolated from them.  i
> > would expect to have to do something like the following. suppose
> > that i have two base architectures, each with an element "name". i
> > would like to derive an architecture to comprise descriptions of
> > both sorts. nothing new.
>
> > <!-- base arch 1. -->
> > <!ELEMENT name ((first, last) | %name-content;) >
> > <!ATTLIST name
> >   address-form (PSEUDONYM | LEGAL) "LEGAL">
> >
> > <!-- base arch 2. -->
> > <!ELEMENT name %name-content; >
> > <!ATTLIST name
> >   address-form (ASSOCIATIVE | LITERAL) "LITERAL">
>
> > while the provisions of enabling architectures make it possible to
> > use architectural form attributes to disambiguate the "name" element
> > names by creating a 2-d namespace for element names, and to
> > disambiguate the "address-form" attribute names by using the
> > remapper attribute to, likewise, create a 2-d namespace for
> > attribute names, and then to map them onto unique positions within a
> > 1-d namespace, i have not found the provision to enable declaring
> > distinct values for the entities. how would one distinguish
> > %name-content from %name-content in a derived architecture in order
> > to specify the respective entity declarations?
>
> > maybe i don't need to. i thought i would.
>
> I don't think you need to.  When you create an element subtype from an
> element type in a base architecture (a supertype), it doesn't matter
> whether the content model of the supertype was expressed by means of
> one or more parameter entities.  For all purposes of subtyping, it
> only matters what the replacement text of those parameter entities
> was.  I can see where it might sometimes be convenient to re-use the
> same parameter entities that were used in the base architecture, but
> there is no provision in the current enabling architectures syntax for
> that, and it's not necessary, anyway.  I doubt it would be worth the
> added syntactic complexity.  You would have to cause the names in the
> replacement texts of the supertype's architecture's parameter entities
> to be somehow automagically translated into the corresponding names in
> the subtyping architecture.
>
> [I'm trying to use the "subtype/supertype" vocabulary instead of the
> "inheriting/inherited" vocabulary here; does it work better?]
>
> -Steve
>
> --
> Steven R. Newcomb, President, TechnoTeacher, Inc.
> srn@techno.com  http://www.techno.com  ftp.techno.com
>
> voice: +1 972 231 4098 (at ISOGEN: +1 214 953 0004 x137)
> fax    +1 972 994 0087 (at ISOGEN: +1 214 953 3152)
>
> 3615 Tanner Lane
> Richardson, Texas 75082-2618 USA




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