Proposed Changes to the Interface Component, Features and Properties

This proposal is a follow-on to my note [1].

The {operations}, {faults}, {properties}, and {features} properties of the 
Interface component are defined as derived properties rather than as being 
directly mapped onto the XML infoset.

The {operations} and {faults} include the Operation and Fault components 
directly defined in the Interface component and those inherited from any 
Interface components that this component extends.

The {features} and {properties} similarly include all directly defined and 
inherited Feature and Property components.

I recommend that we change the definition of the above properties to 
include only those components that are directly defined in the Interface, 
and introduce another set of derived properties that are computed from the 
directly defined properties as follows:

{all operations} and {all faults} include those directly defined and those 
inherited from extended Interface components.

{in-scope features} and {in-scope properties} include those directly 
defined, those inherited from extended Interface components, and those 
included from parent components. This is analogous to the [in-scope 
namespaces] property of the XML Infoset [2].

Furthermore, we should add {in-scope features} and {in-scope properties} 
to all components that have {features} and {properties}.


The benefit of these changes is that we have a clear and consistent naming 
convention for directly defined properties versus derived properties.

Editorially, we do not have to update the description of each affected 
component. We could just add a section that defined the meaning of 
{in-scope features} and {in-scope properties}.

[1] 
http://lists.w3.org/Archives/Public/public-ws-desc-comments/2005Jan/0007.html
[2] http://www.w3.org/TR/xml-infoset/

Arthur Ryman,
Rational Desktop Tools Development

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