Widgets are used when the handling of data in the client application is too complicated to do with the automatic domain definition recognition of the FIELD element. Widgets allow several different sources of data to be connected to a control that can then supply data to several different targets.
There are a number of predefined types of WIDGET element. Each type of WIDGET can contain one or more WIDGET_PARAMETER elements. The configuration of these WIDGET_PARAMETER elements depends on the type of the widget. These are described in the sections below.
Most widget types can only be defined within CLUSTER elements (exceptions to this are described below). There may also be restrictions on how many widgets of a particular type can be included in a single UIM document.