<taskdef name="schematool" classname="org.datanucleus.store.schema.SchemaToolTask"
classpathref = "xxx.datanucleus.path"/>

    <schematool failonerror="true" verbose="true" mode="create" >
        <classpath refid="schematool.classpath"/>
        <sysproperty key="datanucleus.ConnectionDriverName"
                     value="${environ.database.ConnectionDriverName}"/>
        <sysproperty key="datanucleus.ConnectionURL"
                     value="${environ.database.ConnectionURL}"/>
        <sysproperty key="datanucleus.ConnectionUserName"
                     value="${environ.database.ConnectionUserName}"/>
        <sysproperty key="datanucleus.ConnectionPassword"
                     value="${environ.database.ConnectionPassword}"/>
        <sysproperty key="datanucleus.Mapping"
                     value="${environ.database.Mapping}"/>
    </schematool>

<echo message = "Generating DataNucleus 'schema'..." />
    <java failonerrors="yes" classname="org.datanucleus.store.schema.SchemaTool" fork="yes"classpathref = "xxx.datanucleus.path">
    <classpath refids="catch.all.path" />
    <jvmarg value="-DLog4j.configuration=file:{MyConfigurationFile.log4j.properties} />
    <jvmarg value="Ddatanucleus.ConnectionDriverName=${environ.database.driver.name}" />
    <jvmarg value="Ddatanucleus.ConnectionURL=${environ.database.url}" />
    <jvmarg value="Ddatanucleus.ConnectionUserName=${environ.database.driver.username}" />
    <jvmarg value="Ddatanucleus.ConnectionPassword=${environ.database.driver.passwd}" />
    <arg value="-action" />
    <arg value="reflect" />
    <arg value= "-file"
    <arg value="${dir}/xml/expectedSchemaExport.xml" />
    <arg value="-schemainfo" />
    <arg value="DataNucleus" />
    </java>