Gets the subject of the element this operation relates to.
![](../icons/collapse_all.gif)
![](../icons/collapse_all.gif)
The subject or prefix of the element that this operation relates to.
![](../icons/collapse_all.gif)
If this is an ADD, REMOVE or INSERT operation, the method returns the subject of the element.
If this is a REMOVE_WITH_PREFIX operation, the method returns the prefix that specifies the elements to remove.