Routing

Routing is a similar concept to relevance. However, XForms allows quite complex routing between form controls. For example, on a large form with many pages, it is often the case that to fix an error in one page the user needs to navigate back to a previous page. The HTML-like mark-up employed by XForms allows these types of relationships to easily be established.

In the following screenshot two form controls are in effect linked together since for them both to be valid, the length of time remaining on a lease cannot be greater than the full term of the lease:

However, if there is an error the user may not choose to correct the nearest control since the fault may be with the other part of the 'pair'. For example, if the full term of the lease was set to 60, and the remaining term set to 65, it's difficult to which of the two values is in error. To make things easier for the user, the form includes 'shortcuts' to the 'other' control; in the error messages below (only shown when the data is invalid) the text with the light blue background refers to the 'matching' control, and clicking on it causes the focus to be set to that form control:

In this example the controls are close by, but in a very large form this technique can greatly assist the user.