• Chapter 1: Getting Started with Stylus Studio
• Chapter 2: Editing and Querying XML
• Chapter 3: Converting Non-XML Files to XML
• Chapter 4: Working with XSLT
• Chapter 5: Creating XSLT Using the XSLT Mapper
• Chapter 6: Debugging Stylesheets
• Chapter 7: Defining XML Schemas
• Chapter 8: Defining Document Type Definitions
  • What Is a DTD?
  • Creating DTDs
  • About Editing DTDs
  • About Modifiers in Element Definitions in DTDs
  • Defining Elements in DTDs
  • Defining General Entities and Parameter Entities in DTDs
  • Inserting White Space in DTDs
  • Adding Comments to DTDs
  • About Node Properties in DTDs
  • Associating an XML Document with an External DTD
  • Moving an Internal DTD to an External File
• Chapter 9: Writing XPath Expressions
• Chapter 10: Working with XQuery in Stylus Studio
• Chapter 11: Composing Web Service Calls
• Chapter 12: Accessing Relational Data as XML
• Chapter 13: Extending Stylus Studio
• Chapter 14: Stylus Studio Reference

Home > Online Product Documentation > Table of Contents > Parameter Entity Example in a DTD

Parameter Entity Example in a DTD

Suppose you define the invoice parameter entity as an internal entity as follows:

<!ENTITY % customer "name, street, city, state, zipcode">
               

            

The percent sign ( %) after the ENTITY keyword indicates that this is a parameter entity. Later in the DTD, you can reference this parameter entity as follows:

<!ELEMENT invoice (%customer;, item, price, date)>
               

            

When this DTD is processed, it is as if you had specified the following:

<!ELEMENT invoice (name, street, city, state, zipcode, item, price, date)>