- From: Dan Vint <dvint@dvint.com>
- Date: Thu, 03 Feb 2005 12:29:50 -0800
- To: xmlschema-dev@w3.org
I would expect the effect to be different depending upon the use of
extension or restriction. With extension it should automatically be
whatever the original definition was, not a new default of false.
For restriction, I could see requiring that you get the declaration
correct, but a default is not appropriate here either. My logic here is
that restriction requires me to replicate most of the original content
model anyway, I would expect the "mixed" attribute to be included in that
process.
..dan
At 11:45 AM 2/3/2005, G. Ken Holman wrote:
>It appears that one cannot redefine a type and leave the mixed= nature of
>the original type untouched, which would be important if it were not known
>or, more important, arbitrary.
>
>Looking at Part 1, Section 3.4.2, mixed= on <xsd:complexType> has a
>default value of false.
>
>Consider I might have a type with mixed content:
>
> <xsd:complexType name="abcType" mixed="true">
> <xsd:attribute ...>
> ...
>
>Now, I redefine that type in an importing schema fragment:
>
> <xsd:redefine ...>
> <xsd:complexType name="abcType">
> <xsd:complexContent>
> <xsd:extension base="abcType">
> ...
>
>The standard states there is an implicit mixed="false" because of the
>default value. This turns off my mixed content, when all I wanted to do
>was extend the existing type with some elements.
>
>In this case I know I can just add mixed="true" in the redefinition to
>ensure the content is mixed ... but am I missing a way in which I can
>redefine a type while preserving its mixed= property?
>
>My guess is no, because if I wanted to turn off the mixed content property
>I would intuitively say mixed="false" ... but my intuition to leave it
>unchanged is to leave the attribute absent ... but when absent the default
>value forces the redefinition to not be mixed. So, it appears I have to
>know a priori that a given type I'm redefining is mixed or not and the
>burden is on me to preserve it.
>
>Have I read anything incorrectly in this regard?
>
>Thanks for any guidance.
>
>............................... Ken
>
>--
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Received on Thursday, 3 February 2005 20:26:32 UTC