Defining Structure Rules in a Sample DTD

This topic is part of a sequence that starts with Creating a Sample DTD.

To specify the rules for the structure of the book element:
1. Click the book node in the DTD tree if it is not already selected.
2. Click New Modifier .
3. In the drop-down list that appears, scroll down and double-click Sequence. This indicates that the book element can include one or more elements.
4. Click New Reference to Element .
5. Type title in the entry field and press Enter.

Because the reference to the title element appears immediately after the Sequence modifier, the DTD editor assumes that the default behavior is what is wanted. That is, the book element must contain exactly one instance of the title element.

6. Click the Sequence modifier.
7. Click New Modifier .
8. Double-click One or More. (There can be one or more author elements in each book element.)
9. Click New Reference to Element .
10. Type author in the entry field and press Enter.

At this point, the definition of the book element is complete, and the tree diagram of bookstore.dtd should look like this:

However, you have not yet specified that you want the book element itself to be optional. You need to do this in the element that references the book element. For example, suppose the bookstore element is the root element in XML documents that use this DTD. Further suppose that you want the book element to be a child of the bookstore element.

You can define the bookstore element as follows:
1. Click the DTD node at the top of the tree.
2. Click New Element Definition .
3. Type bookstore in the entry field and press Enter.
4. Click New Modifier .
5. In the drop-down list that Stylus Studio displays, double-click Optional.
6. Click New Reference to Element .
7. Type book in the entry field and press Enter.
8. Click Save

Single Source Publishing

Single source publishing is the ability to use one source of information for generating multiple types of output. Stylus Studio XML Publishing enables Single Source Publishing - publish PDF or HTML documents from Relational, XML or Legacy files.

XML Document Wizards

Stylus Studio XML Document Wizards help you easily convert EDI, flat files, and other document formats to industry-standard XML.

XML Whitepapers

Learn how XML can help you meet your business objectives by reading free XML Whitepapers covering XML, XML Schema, XQuery, SQL/XML, and FIXML technolgies employed in real world case studies.

Introduction to the XQuery Mapper

This free online video demonstration covers Stylus Studio's synchronized XQuery editing and mapping tool which allows you to create any XQuery expression, either manually using Stylus Studio's XQuery editor.

Stylus Most Wanted

 
Free Stylus Studio XML Training:
W3C Member