HOME HTML CSS XML JAVASCRIPT ASP PHP SQL MORE...

Schema Tutorial

XSD HOME
XSD Intro
XSD Why Use
XSD How To
XSD <schema>

Simple Types

XSD Elements
XSD Attributes
XSD Restrictions

Complex Types

XSD Elements
XSD Empty
XSD Elements Only
XSD Text Only
XSD Mixed
XSD Indicators
XSD <any>
XSD <anyAttribute>
XSD Substitution
XSD Example

Data Types

XSD String
XSD Date
XSD Numeric
XSD Misc

XSD Editor
XSD Summary

Schema References

XSD Reference
XSD Validator

XML Schema choice Element

Complete XML Schema Reference

Definition and Usage

XML Schema choice element allows only one of the elements contained in the <choice> declaration to be present within the containing element.

Element Information

Parent elements: group, choice, sequence, complexType, restriction (both simpleContent and complexContent), extension (both simpleContent and complexContent)

Syntax

(The ? sign declares that the element can occur zero or one time, and the * sign declares that the element can occur zero or more times inside the choice element)

Attribute	Description
id	Optional. Specifies a unique ID for the element
maxOccurs	Optional. Specifies the maximum number of times the choice element can occur in the parent element. The value can be any number >= 0, or if you want to set no limit on the maximum number, use the value "unbounded". Default value is 1
minOccurs	Optional. Specifies the minimum number of times the choice element can occur in the parent the element. The value can be any number >= 0. Default value is 1
any attributes	Optional. Specifies any other attributes with non-schema namespace

Example 1

<xs:element name="person">
  <xs:complexType>
    <xs:choice>
      <xs:element name="employee" type="employee"/>
      <xs:element name="member" type="member"/>
    </xs:choice>
  </xs:complexType>
</xs:element>

The example above defines an element named "person" which must contain either a "employee" element or a "member" element.