The result returned by this property depends on the iterator type:
  1. Element Iterator: The property returns null.
  2. Attribute Iterator iterating by attributes: The property returns the current attribute. This is the same as the expression: iterator.curItem.toAttr().
  3. Attribute Iterator iterating by multiple values of an attribute: The property returns the attribute whose values are being iterated.
Property Scope:
This property is valid only within the iterator's Step Expression and body-block.