The syntax of this message is specified in section

The server sends this message to make a method call on the client's host.

The client's pipeline MUST be in a Running state (section and a successful response to the wxf:Command (section message MUST be received while processing this message.

The client interprets the method and parameter information, as described in section 2.2.6, and transmits the data to the higher-layer for its response. The client collects the response from the higher-layer, if any, and sends a PIPELINE_HOST_RESPONSE message (section to the server.