forms
A form is built from a list of form inputs.
One form can added to the bottom of a page. Forms are shared across pages and page sets so one form can be used on multiple pages.
Each form input has a "show if" value. This is an expression that must evaluate to a boolean value, if true the input will show, if false it will not. The inputs have an trigger to auto submit the form on a value change. The expression can contain value from input use earlier in the form, the value is the name of the input except for multiple inputs where the variable name sis the input name, an underscore and the option. The type of the value follows the input, and is one of boolean, integer, real or string.
The forword value is also an expression like "show if" but must evaluate to a string.