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. Description is not available. Description is not available. This type can hold a number of digits count _order_number. Description is not available. Provide an extension hook to customize PendRtrnRef. This type can hold a string of max length of 18 characters. This type can hold a string of max length of 20 characters. This type can hold a number of digits count 10.