Do and support extensibility elements?

[John Kaputin (gmail)]

I'd like to clarify which WSDL elements support extensibility elements.

Part 1, section 6.1 Element based Extensibility states:
WSDL 2.0 allows namespace-qualified element information items whose [namespace name] is NOT "http://www.w3.org/@@@@/@@/wsdl" to appear among the [children] of specific element information items whose [namespace name] is "http://www.w3.org/@@@@/@@/wsdl".

The word 'specific' suggests some WSDL elements do not support extensibility elements. This is backed up by the WSDL 2.0 schema at http://www.w3.org/2005/08/wsdl/wsdl20.xsd which indicates that all WSDL 2.0 elements except <import> and <include> support extensibility elements.

However, in Part 1 all of the sections that describe the xml representation for each WSDL element state that the [children] of the WSDL element may contain:
Zero or more namespace-qualified element information items whose [namespace name] is NOT "http://www.w3.org/@@@@/@@/wsdl"

i.e. this text applies to <include> and <import> too, in sections 4.1 and 4.2, which seems to contradict the schema.

Is this correct? Can <include> and <import> have extensibility elements?

Thanks,
John Kaputin.