This is a major upgrade to my type system for J (background: https://github.com/Pascal-J/type-system-j)
One of the main uses for that project is to validate multiple fields in a record, and these tools let us build self validating and documenting GUI forms in a single line of code. The project is available here: https://github.com/Pascal-J/records-j A sample app is a recordform that is a GUI builder to create new recordforms. It looks better in J804, but there is a edith related bug that causes wd to show an unneccesary error message (in fields subform of formbuilder when it updates the master form's edith control). No crashes/popups in J803. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
