[XBL] Loading External Resources

Dear XBL experts,

This email comments on the 7 September 2006 LCWD of XBL 2.0.

In Section 3.1, "Loading External Resources", the specification says:

"Such resource sharing is limited to resources loaded by a document, its 
binding documents, its scripts, and its style sheets."

Make this sentence a normative statement: "Resources loaded by ... MUST 
follow the resource sharing described above".

The sentence from the XBL specification "Nested documents and images do 
not share resources with each other or with their container document." 
is in conflict with the notion of primary document in SVG see 
"Externally referenced documents" 
[http://www.w3.org/TR/SVGMobile12/linking.html#externalReferences]
This means that an SVG player would have to behave differently if it is 
also XBL-compliant. The XBL specification should not impose constraints 
on how documents/resources used by other non-XBL documents should be 
handled.  
 
The example with 'iframe' seems contradictory with the general rule. Is 
this an exception? What are the other exceptions? What about 
<xhtml:object> elements in CDF cases ?

Cyril Concolato