Works great.
I saw through the forum {allOf{x}{y}}, etc... but completely missed that one.
Thanks for the pointer.

Hi,
First of all, congrats for this great piece of software.
I want to use something like this in a more complex expression to rename movies: {imdbid ? imdbid : y}
What I finally want to achieve is:
if (imdbdid exists) {imdbid} else {y}
or better
if (imdbdid exists) {imdbid} else if (y exists) {y ...