Overview of InterSystems IRIS Web Services Overview of InterSystems IRIS Web Services To create a web service in InterSystems IRIS, you create a class that extends %SOAP.WebServiceOpens in a new tab, which provides all the functionality required to make one or more methods callable via the SOAP protocol. In addition, this class automates the management of SOAP-related bookkeeping, such as maintaining a WSDL document that describes a service.