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- From: Michael Anderson <michael@research.canon.com.au>
- To: "Henry S. Thompson" <ht@cogsci.ed.ac.uk>
- Date: Fri, 10 Mar 2000 09:13:10 +1100
"Henry S. Thompson" wrote:
> Michael Anderson <michael@research.canon.com.au> writes:
>
> > 2. Also with restrictions, if attributes of elements are omitted do they
> > default to the standard default or the values defined in the base type
> > definition? Or is it an error to omit attributes previously defined in
> > the base?
>
> Do you mean if they are omitted in instances? If the derived type
> definition has defaults, they will get used.
I mean in the Schema document. So for example, based on the Primer example:
(take note of the attribute minOccurs)
<complexType name="World-Address" >
<element name = "name" minOccurs ="0" maxOccurs="*" />
etc.
</complexType>
<complexType name="US-Address" base="ipo:World-Address" derivedBy="restriction"
>
<element name = "name" type="string" />
etc.
</complexType>
What now is the value of minOccurs for the "name" element in the type
"US-Address"? Is it 0 as that was defined in the base type, or is it 1 which is
defined as the default for elements (section 4.4.2 of Part 1:Structures)?
0 or 1?
Thanks
Michael.
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