The initiator is the sequence of characters that signals the start of this element. The initiator can be used for an element at any level, or having any group type. For example, you might have a situation where one of several elements can occur, and each element has a certain character sequence that precedes it. In this case, you can define a parent element to these elements with a group type of choice, and then define the initiator characters in each child element.
The Initiator and Terminator Special Characters apply here.
The initiator characters are not considered part of the text of the element depending on the setting of the Include Initiator property below.