> <?xml version="1.0"?>
> <?xml-stylesheet type="text/xsl" href="http://www.foo.org/"?> 
> <SOAP-ENV:Envelope
>   xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
>   xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" (etc.)

This is an invalid SOAP request as processing instructions are valid
anywhere in the SOAP response. In SOAP 1.2 a client MUST generate a SOAP
fault if a response is received with a processing instruction.

I thought the stylesheet parameter was only suppose to be acted upon by
SRU servers and ignored (rather than return a diagnostic) if sent to an
SRW server.

Matthew