Hi, Here's my update about the progress that I made last weekend. Sometime ago I started working on https://github.com/devhelpr/expressionrunner , which is library to parse and execute expressions with support for named variables. This weekend I added support for more operators like & | % << >> and so on. This allows me to extend my tixy land implementation and it is now more in line with the original. But that's not the end goal offcourse. I want for example to be able to use this expressionrunner for visibility conditions of form fields (in the form-nodes, which is also a new feature) but also in my "mini excel"-data-grid node as formulas to reference cells (I've already got the basis covered).