Home > Online Product Documentation > Table of Contents > Description of Element Modifiers in DTDs

< Previous | Next >

Description of Element Modifiers in DTDs

Table 47 describes the available modifiers:

Modifier
Description
Indicator in DTD
Optional
This element can appear once or not at all. (0 or 1)
Question mark ( ?)
Zero or more
This element is optional and repeatable. (0, 1, or more)
Asterisk ( *)
One or more
This element is required and repeatable. (1 or more)
Plus sign ( +)
Choice
Exactly one of the specified subelements must appear.
Vertical bar ( |)
Sequence
If no other modifiers are defined on the Sequence modifier, each subelement in this element must appear exactly once. In other words, it is required. Also, the subelements must appear in the order in which they are specified in the referencing element. You can define other modifiers on the Sequence modifier. In this way, you can specify that some subelements are optional, some appear zero or more times, and some appear one or more times.
Comma ( ,)
Table 47. Element Modifiers

< Previous | Next >

WSDL Editor

WSDL Editor featuring a graphical WSDL viewer, syntax help, Java Web Service code generation and more. Simplify Web Services development with Stylus Studio's Web Service Description Language (WSDL) Editor today!

JavaServer Pages IDE (JSP IDE)

The Stylus Studio JSP IDE provides syntax help and code completion for developing JSP 1.2 and JSP 2.0 applications.

EDIFACT Reference

The EDIFACT Reference is a free developer resource providing the most in-depth information on EDIFACT constructs and data models.

Automotive Companies That Use Stylus Studio

Top automotive companies get their wheels spinning with Stylus Studio 2006. Come see which companies put Stylus Studio in their drivers seat today!

Stylus Most Wanted

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2007 All Rights Reserved.