Message Reference Component is Underspecified

The Message Reference Component description [1] doesn't define the 
semantics of the message when the optional {message content model} 
property is absent.

If the property is absent is that the same as #any?

[1] http://www.w3.org/TR/2004/WD-wsdl20-20040803/#MessageReference

Arthur Ryman,
Rational Desktop Tools Development

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