order.dtd

随书的代码

<!ELEMENT Order (Customer, Product+, Subtotal, Tax, Shipping, Total)>
<!ELEMENT Customer (#PCDATA)>
<!ATTLIST Customer id ID #REQUIRED>
<!ELEMENT Product (Name, SKU, Quantity, Price, Discount?, 
                   ShipTo, GiftMessage?)>
<!ELEMENT Name (#PCDATA)>
<!ELEMENT SKU (#PCDATA)>
<!ELEMENT Quantity (#PCDATA)>
<!ELEMENT Price (#PCDATA)>
<!ATTLIST Price currency (USD | CAN | GBP) #REQUIRED>
<!ELEMENT Discount (#PCDATA)>
<!ELEMENT ShipTo (GiftRecipient?, Street+, City, State, Zip)>
<!ELEMENT GiftRecipient (#PCDATA)>
<!ELEMENT Street (#PCDATA)>
<!ELEMENT City   (#PCDATA)>
<!ELEMENT State  (#PCDATA)>
<!ELEMENT Zip    (#PCDATA)>
<!ELEMENT GiftMessage (#PCDATA)>
<!ELEMENT Subtotal (#PCDATA)>
<!ATTLIST Subtotal currency (USD | CAN | GBP) #REQUIRED>
<!ELEMENT Tax (#PCDATA)>
<!ATTLIST Tax currency (USD | CAN | GBP) #REQUIRED
              rate CDATA "0.0"
>

<!ELEMENT Shipping (#PCDATA)>
<!ATTLIST Shipping currency (USD | CAN | GBP) #REQUIRED
                   method   (USPS | UPS | Overnight) "UPS">
<!ELEMENT Total (#PCDATA)>
<!ATTLIST Total currency (USD | CAN | GBP) #REQUIRED>