Minor changes to the RI

[KevinBenson]

Placed a new RI document at: 
http://www.ivoa.net/twiki/bin/view/IVOA/RegistryInterface
Main changes were on the WSDL documents.  Please have a look at the 
document and respond with any issues you have with the document.  I did 
not receive much response from the last submission some months ago.

Currently only one main unresolved Issue (please feel free to start a 
new thread of e-mails on this issue):
1.) Deals with how to define namespaces for the xpath prefixes found in 
ADQL for the "Search" method.
      * Current spec says place all namespaces on the "Where" element.  
This may change, currently added because in some web services 
implementations dealing with Message style (dealing with Raw XML) and 
parsers, you have to go look for namespaces yourself which can be a bit 
tiresome and a pain.  This is why it was added to specify where to place 
namespaces.
      * Ray is testing out another idea about elementDefaultForm
      * Since we have to define the "Where" element in the 
RegistryInterface schema, a better idea may simply be to add a small 
extension "string" type element to define namespaces.  This would also 
prevent the possibility of a web service implementation normalizing out 
the namespace(s) in the SOAP message on the request.

Summary of Changes:
Document:
  Reference ADQL 1.0 instead of 0.9

WSDL:
   Namespaces corrected
   exclusiveArgs was not referenced correctly in RegistryPublish wsdl 
hence WSDL2Java was not working for publishingRegistry.wsdl
   References ADQL 1.0
   XQuery uses the xs:any element now.


cheers,
Kevin