#1 Add clause to forbid usage of WS-Addressing Metadata attribute "action" in WSDL

[David]

WS-Addressing Metadata (WS-AM) is referenced normatively within MDPWS. It facilitates devices to add action attributes to input and output messages in their WSDLs in order to require WS-Addressing action headers being added to incoming and outgoing SOAP messages. If there is no action attribute present in the WSDL, a defaulting algorithm applies: https://www.w3.org/TR/ws-addr-metadata/#explicitaction.

To unburden clients from parsing the WSDL and look for WS-AM action attributes we should prevent devices from adding the action attribute and instead rely on the defaulting algorithm.

RXXX: A SERVICE PROVIDER SHALL NOT provide WSDL documents that contain WS-AM action attributes.

(or similar)

[David]

To increase interoperability with Web Service frameworks, I suggest to prescribe all SOAP HTTP binding soapAction attributes within the WSDL to be setteled with corresponding port type input defaulted actions.