Items are the basic elements of a page. Each item on the page must have a unique scope identifier (sid.) You can also add custom items to your forms.
XForms items are required when you are creating an XFDL form that contains an XForms data model.
These items are used to contain XForms constructs that do not normally exist in XFDL, such as tables and checkgroups that automatically repeat elements based on the structure of the data model.
XForms items follow the same syntax rules as XFDL items.
The syntax of an item definition is as follows:
<itemType sid="itemTag">
option definition1
...
option definitionn
</itemType>
The sid attribute uniquely identifies an item. (See Scope identifiers (sid).) Every item sid in a page must be unique. The itemType element identifies the type of item to create. (For example, <field...> defines the item as a field.) This section contains information about XFDL-defined item types and the options available for each.