Reference Manual for Custom User Interface "Manager XML"


When defining a custom modular input in an app, it is possible to design a custom user interface for setting up the parameters of that modular input. Some information on how to do this is available here:

That page shows an example XML definition that contains code that seems to generate GUI elements on the fly. For example this:

<key name="processValueEdit">[[ e for e in ['sourcetype'] if form_defaults.get(e) ][0]]</key>

I was unable to figure out how this works and couldn't find more documentation about it. Any hints where to find more information? Thanks!