values for view, edit, and id, sorting

[magwas]

As both xml and json commonly encode complex data types, it would be nice to have the ability to leverage on it, in the same way the database field plugin does:
See especially the configuration section of its documentation:
https://bitbucket.org/wimdeblauwe/jdvp/wiki/Home
For example it could be a common use case to display the name attribute of objects when viewing, but use the id attribute for computation.

[AndreyVMarkelov]

In progress