This is root element of this document which contains name space definitions for the document elements. It's a referenced element. For detailed description, please refer referenced element doc. It's a referenced element. For detailed description, please refer referenced element doc. Description is not available. Description is not available. This field uniquely identifies the ticket type which is associated with the item. Provide an extension hook to customize ItemTcktRef. Provide an extension hook to localize ItemTcktRef. This type can hold a string of max length of 25 characters. This type can hold a string of max length of 4 characters.