ServiceRequest   

represents a service request built from service, which might be a connected ServiceObject or a valid service name, and request "req".

ServiceRequest[service,"req",param]

represents a service request, built from the service service, request "req" and parameters param.

represents a service request, built from association assoc.

Details

ServiceRequest gives a symbolic representation of a service request; it does not execute the request.
The following entries must be given in the association:
"Request" request to be made

"Parameters" parameters for the request

"Service" name of the service or service object
ServiceRequest[…]["prop"] extracts the value for the property "prop" of the service request.
Possible properties include all components and additional elements, as well as:

	"Service"	external service
	"Request"	request name
	"Parameters"	request parameters
	"Properties"	list of all possible properties
	"PropertyAssociation"	association giving values of all properties

Create a request for "PubChem" service:

List requests supported by the "PubChem" service:

Open a connection to an external service:

Create a request:

Get properties:

Extract properties from the request:

Get request data as "PropertyAssociation":

Execute the request:

Submit the request and set result:

Build a request with an association:

Execute the request:

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	"Request"	request to be made
	"Parameters"	parameters for the request
	"Service"	name of the service or service object