As per current spec ,

This class loader supports the loading of classes from the contents of a multi-release JAR file that is referred to by a given URL.

However even loading of a versioned resource(text file etc.) is supported by URLClassLoader.

For E.g.:

mr.jar has following structure:

META-INF/MANIFEST.MF
iterator1.txt
META-INF/
META-INF/versions/
META-INF/versions/9/
META-INF/versions/9/iterator1.txt
META-INF/versions/10/
META-INF/versions/10/iterator1.txt

  URL url = Paths.get("D:\\JEP-238\\mr.jar").toUri().toURL();
        URLClassLoader urlClassLoader = new URLClassLoader(new URL[]{url});
        System.out.println(urlClassLoader.findResource("iterator1.txt"));
        
        OUTPUT : jar:file:/D:/JEP-238/mr.jar!/META-INF/versions/9/iterator1.txt

Hence the spec should mention it.

It could be:
"This class loader supports the loading of classes and resources from the contents of a multi-release JAR file that is referred to by a given URL."