Enrich tuples with data from external web services.

Parameter:

• serviceMethod: REST/SOAP
• method: REST/SOAP
• url:static part of the url
• urlSuffix: url part after argument
• arguments: Options ...
• operation: operation used to call a SOAP-Webservice
• datafields: the datafields received through the webservice
• charset: the charset, e.g. UTF-8
• parsingMethod: XML or JSON
• keyValueOutput: boolean
• wsdlLocation: url to the location of the wsdl file