Venkat,
Some answers inline.
Venkata Krishnan wrote:
Hi,
I just took a look at the latest assembly model specs and find a
couple of
things that I don't understand. Could somebody help me out with
clarifications.
i) There are two different illustrations for the schema for a property
element...
<property name="xs:NCName" (type="xs:QName" | element="xs:QName")
many="xs:boolean"? required="xs:boolean"?>*
default-property-value?
</property>
<property name="xs:NCName" (type="xs:QName" | element="xs:QName")
many="xs:boolean"? noDefault="xs:boolean"?>*
default-property-value?
</property>
i.e. one uses a 'required' attribute and another the 'noDefault'
attribute.
The xml schema definitions in the appendix however define only
'noDefault'
and so I understand that 'required' is a typo that needs to be
removed. Is
this right?
Yes, "required" is a typo and should be changed to "noDefault"
ii) When defining a 'property value' what is the need to specify the type
for the property. Isn't it something that is already specified in the
property definition. i.e. in the following what is the need for the
'type'
or 'element' attributes
<property name="xs:NCName" (type="xs:QName" | element="xs:QName")?
many="xs:boolean"? source="xs:string"? file="xs:anyURI"?>*
property-value?
</property>
Thanks
- Venkat
I think that there are a few cases where you need both the type and the
value:
- Define the type of a property inside a <componentType> and at the same
time configure the default value.
- Define the type of a property inside a <composite> and at the same
time configure it, this will be the default value for the property in
instances of the composite.
- Configure a property on a <component>, and at the same time define its
type, I think this is what you'll do in top-down scenarios, where you'll
define the component "shape" as you declare and configure it, before
defining its implementation.
--
Jean-Sebastien
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