your company name name of company you are ordering stuff from book or music isbn for books, id for music title for books, album names for music. how many copies of this item are you ordering + which option (provided by partnerCompany) did you choose to ship your order. referring to the "id" attribute in the companyInfo/shipping/method field in the part1 DTD your customer's address

street address

... optional depending on country ... ? optional depending on country ? contact information of your destination phone number fax number ?