ide/xml.schema.completion/test/unit/src/org/netbeans/modules/xml/schema/completion/resources/AbstractElementChildOne.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema version="1.0" 
           xmlns="urn:child1"
           xmlns:parent="urn:parent"
           targetNamespace="urn:child1"
           xmlns:xs="http://www.w3.org/2001/XMLSchema" 
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.w3.org/2001/XMLSchema XMLSchema.xsd
                               urn:parent AbstractElementParent.xsd"
           elementFormDefault="qualified" xml:lang="EN">

    <xs:import namespace="urn:parent" schemaLocation="AbstractElementParent.xsd"/> 
     
    <xs:element name="child-one" substitutionGroup="parent:child" type="ChildOne"/>

    <xs:complexType name="ChildOne">
        <xs:complexContent>
            <xs:extension base="parent:Child"/>
        </xs:complexContent>
    </xs:complexType>
</xs:schema>