The contents of a prescription form depend on the type of medication being prescribed and this determines which attributes are required and thus which input controls will be displayed.

There are four aspects of the prescription form that can be considered to be dynamic:

• The display of a set of input controls. The controls displayed will depend on the type of medication being prescribed
• Input controls that may appear when a value is defined in another input control
• Input controls that may be pre-filled depending on selections elsewhere in the form
• Input controls whose dimensions may change as the form or field is completed