spring-projects-spring-framework/spring-framework-reference/build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="spring-framework-reference" default="doc">

	<property name="doc.type" value="reference"/>
	<property name="docbook.build.dir" value="${basedir}"/>
	<property file="${basedir}/../build.properties"/>
	<import file="${basedir}/../spring-build/docbook/default.xml"/>

</project>