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. NA This field contains a number identifying the user-defined attribute. This field contains value of the user-defined attribute for the item. Provide an extension hook to customize ItemUDALOVRef. Provide an extension hook to localize ItemUDALOVRef. This type can hold a string of max length of 25 characters. This type can hold a string of max length of 30 characters. This type can hold a number of digits count 5.