Reference element based on simpleType


File: Data.xml

<?xml version="1.0"?>
<airport 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/>              
    <aircraft>F-16</aircraft>

</airport>

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" default="Boeing 747">
        <xsd:simpleType>
            <xsd:restriction base="xsd:string">
                <xsd:enumeration value="Boeing 747"/>
                <xsd:enumeration value="F-16"/>
                <xsd:enumeration value="A-10"/>
            </xsd:restriction>
        </xsd:simpleType>
    </xsd:element>

    <xsd:element name="airport">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="aircraft" maxOccurs="2"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>

</xsd:schema>

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Reference element based on simpleType : element « XML Schema « XML

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