As described in
SOAP, OpenEdge supports the following SOAP message formats:
In general, you can use the same application code to create Web services for clients that support any of these formats. Each Web service instance can only accept a single SOAP format within each target namespace. You must generate and deploy a separate Web service for each format. When you deploy the same Web service definition for multiple SOAP formats, Progress Software Corporation recommends that you specify a unique target namespace to deploy each format on the single WSA instance.