From W3C XForms Group Wiki (Public)
One issue to address pertains to the proposal to have a Constraint-based_Alert (see also MIP_Names,_Types,_Etc.). If more than one constraint is expressed, then the alert should be based on which constraint was violated. A definition would be required for what to do if multiple constraints are violated. The alert messages could be concatenated with a separating space, linefeed or configurable separator.