Examples of XML and DTD constraints-product catalog DTD

It Programmer development Essentials-all kinds of resources download list, history of the most IT resources, personal collection summary. product.dtd File:

<!--Product Catalog DTD--<! ENTITY table "Desks" > <! ENTITY price "100.0" > <! ENTITY Street "Chinatown" > <! ENTITY% product "Specifications+,options?" > <! ENTITY% category "(handtool| table| shop-professional) "> <! ELEMENT Catalog (product+) > <! ELEMENT product (%product;,price+,notes?) > <! ELEMENT Specifications (#PCDATA) > <! ELEMENT options (#PCDATA) > <! ELEMENT Price (#PCDATA) > <! ELEMENT notes (#PCDATA) > <! ATTLIST Catalog ID ID #REQUIRED > <! Attlist Product name CDATA #IMPLIED category%category; "Handtool" Partnum CDATA #IMPLIED Plant (pittsburgh| milwaukee| Chicago) "Chicago" Inventory CDATA #FIXED "Instock" > <! ATTLIST Specifications Weight CDATA #IMPLIED power CDATA #IMPLIED > & lt;! Attlist Options Finish (metal| polished| Matte) "Matte" aDapter (included| optional| notapplicable) "Included" Case (hardshell| Soft| notapplicable) "Hardshell" > <! Attlist price MSRP CDATA #IMPLIED Wholesale CDATA "All" street CDATA #IMPLIED shipping CDATA #IMPLIED >

product.xml File:

<?xml version= "1.0" encoding= "Utf-8"?> <!

DOCTYPE Catalog SYSTEM "PRODUCT.DTD" >

<catalog id= "cata1" >

   <product category= "Handtool" >

      <specifications weight= "2.0kg" > Wrench </specifications>

      <price street= "Hong Kong Street" >80.0</price >

      <notes> This is a wrench </notes>

   </product>

   <product category= "Table" >

       < specifications>&table;</specifications>

       <price street= "&street;" wholesale= "section" > &price;</price>

   </product>

</catalog>