I have a freeform project for Apache Ant, with

<java-data
xmlns="http://www.netbeans.org/ns/freeform-project-java/2">
    <compilation-unit>
       
<package-root>${project.dir}/src/main</package-root>
        <classpath mode="compile">${cp}</classpath>
        <classpath
mode="boot">${jdk12.home}/jre/lib/rt.jar</classpath>
       
<built-to>${project.dir}/build/classes</built-to>
       
<built-to>${project.dir}/dist/lib/ant.jar</built-to>
       
<javadoc-built-to>${project.dir}/build/javadocs</javadoc-built-to>
        <source-level>1.3</source-level>
    </compilation-unit>
    <compilation-unit>
       
<package-root>${project.dir}/src/testcases</package-root>
        <unit-tests/>
        <classpath
mode="compile">${test.cp}</classpath>
        <classpath
mode="boot">${jdk12.home}/jre/lib/rt.jar</classpath>
       
<built-to>${project.dir}/build/testcases</built-to>
       
<javadoc-built-to>${project.dir}/build/javadocs.test</javadoc-built-to>
        <source-level>1.3</source-level>
    </compilation-unit>
</java-data>

Now when I look in the properties dialog under
Output, the Javadoc Output shows the Ant property
unsubstituted. This is inconsistent with the
display of classes build output. See screenshot.

May also be the case that the Browse button does
not normalize the path against ${project.dir}; I
did not test this.