Yep make sense - thanks Rob and Matthew for explaining.
>From: Matthew J. Dovey [mailto:[log in to unmask]]
>Sent: 30 April 2004 17:13
>To: [log in to unmask]; [log in to unmask]
>Subject: RE: Stylesheets in SRW
>> Hmm if it is an error for the client to request a stylesheet,
>> does that mean that the stylesheet parameter is not needed in
>> requestType ?
>We've tried very hard from day 1 to try to keep the
>specifications for SRU, SRW etc. so that the only real
>difference is the protocol binding (SRU binds to HTTP GET, SRW
>binds to SOAP over HTTP). This is reflected in the WSDL and
>XSD (we have one schema defining the types for both, one wsdl
>defining the PortTypes the variance only happens in that we
>have different wsdl for the two bindings). This has resulted
>in the odd artefact in the spec. (e.g. SRW has no real need of
>the echoed...Request mechanism).