reference with maxOccurs
File: Data.xml <?xml version="1.0"?> <ElementExamples xmlns="http://www.java2s.com" xmlns:ex="http://www.java2s.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation= "http://www.java2s.com Schema.xsd"> <aircraft>F-16</aircraft> </ElementExamples> File: Schema.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.java2s.com" xmlns="http://www.java2s.com" elementFormDefault="qualified"> <xsd:element name="aircraft" type="xsd:string"/> <xsd:element name="ElementExamples"> <xsd:complexType> <xsd:sequence> <xsd:element ref="aircraft" maxOccurs="2"/> </xsd:sequence> </xsd:complexType> </xsd:element> </xsd:schema>