Defines types and elements needed for the query service of a peer. This tag allows to declare a query. Some tool may simply transform it into a Web service because with Axis2 it is wuite straightforward. Some comments on the Web service. When the Web service is deployed this comment should become a comment for the Web service Normally this name should become a Web service name If one needs to declare a parameter and use it multiple times, normally "let" clause of XQuery should be used. This element should contain a valid XQuery. The 'param' elements will be replaced by the query with actual incoming parameter values The content of the element is the actual/default parameter value The name given for the parameter This element used in sc/ws-soap/continuousQuery declares the QUERY service call The (parametrized) query declaration. The Web service will possibly install buffers for every parameter and will start waiting for the END_OF_STREAM The actual parameters that should be filled the formal ones specified in the 'declaration'. Whenever there is nothing more to send to the Web service the materializer of the QUERY service call marks END_OF_STREAM and this way the streaming channel stops. The size of stream. This element used in sc/ws-soap/executeGenericQuery declares the GENERIC_QUERY service call Any valid (non-parameterized) XQuery expression. The Web service will pass it to the XML database for execution When there is a specific query service installed on the server, e.g. the (parameterized) query is defined in query.xml, then calling this method will fill formal parameters with actual values, evaluate the query and return the results. Actual parameters for the declared query Instead of strict parameters we allow any element to be a parameter. The name of the parameter corresponds to the element name, the contents of the element are the parameter value