Nesting

MedML supports nesting controls within each other; for example, you can create an item that consists of a set of radio buttons, each of which is a pull-down list, and the last of which is a text control for entering additional descriptive information. The pull-down lists and text control are nested within the radio button control. MedML supports a maximum of four levels of nesting. To minimize complexity and assist performance, attempt to minimize the use of controls within controls, and never exceed the maximum number of nesting levels.