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. Unique identifier for the item. Unique identifier for the supplier. Provide an extension hook to customize ItemSupRef. Provide an extension hook to localize ItemSupRef. This type can hold a string of max length of 25 characters. This type can hold a string of max length of 10 characters.