SOAP supports both synchronous and asynchronous call semantics;
that is, standard RPC as well as message-based,
and can be used with a variety of protocols other than HTTP.
The request has a StockName parameter.
A Price parameter will be returned in the response.
The namespace for the function is defined in "http://www.example.org/stock" address.
The SOAP request:
POST /InStock HTTP/1.1
Host: www.example.org
Content-Type: application/soap+xml; charset=utf-8
Content-Length: nnn
