To prepare a process to create correspondence, you need to set up a UI Mashup application. This UI Mashup application will be complimented with the correspondence structured data.
Example correspondence models using UI Mashup applications can be downloaded from the
tutorials examples section
here:
all-tutorials.zip.
You find the models in folder correspondence/dat.
in the online documentation
Tutorials Examples - Correspondence.
In the UI Mashup application, create a parameter with name CORRESPONDENCE with in and out direction and of structured data type CORRESPONDENCE. Note that it is important to name the parameter CORRESPONDENCE!

Figure: Correspondence UI Mashup Parameter
In the Configuration tab select Via URI and enter the following URL:
http://<hostname>:<portnumber>/<context-root>/plugins/html5-views-common/views/correspondenceContainer.html
For example:
http://localhost:8080/tut-proj/plugins/html5-views-common/views/correspondenceContainer.html

Figure: Example UI Mashup configuration URL
Use a structured data of type CORRESPONDENCE to serve as in- and out-data for the UI Mashup parameter.

Figure: Structured Data to be used as in- out-data for UI Mashup