You can create a message model to model your data format.
If your message models are to be stored as message model schema files, use the New Message Model wizard. If you already have XML Schema files, WSDL files or DFDL schema files, you can import them into an application or library.
If your message models are to be stored in message sets, use the New Message Definition File or New Message Definition File From wizards.
Additionally, you can import application message formats by using the mqsicreatemsgdefs or mqsicreatemsgdefsfromwsdl command-line utilities.
The mqsicreatemsgdefs command has a bulk import capability, but mqsicreatemsgdefsfromwsdl imports only one WSDL definition at a time.