The Gizmo Cookbook is a great tool to help you learn about how to write expressions, and is now available for you to access via the following link:
Gizmo is the language used when creating calculations in OrgVue. This cookbook is a constantly growing collection of Gizmo expressions. It covers the basic grammar of the Gizmo language, common functions, optimisation tips and advice for consultants. You will also find some exercises throughout the book, which are based on the 1505 Training dataset.