Disclosed is a rules based editor configured to edit an equation related element where the rules based editor may use at least one rule related to a pre-built application module that is included in a viewer module. The viewer module may include rendering and equation evaluation instructions. The edited equation related element may be configured to be included in a component description file. The combination of the viewer module and the component description file may be configured to be used to display a version of the equation related element that is analytically related to an input value.