@namespace(uri="filesystemtest", prefix="filesystemtest")
@gmf(foo="bar")
package filesystem;

@gmf.diagram(foo="bar")
class Filesystem {
    val Drive[*] drives;
}
@gmf.node(label="name")
class Drive {
  @gmf.link(label="containsFolder")
  val Folder[*] contentFolder;
  attr String name;
}
@gmf.node(label="name",phantom ="true")
class Folder {
    @gmf.link(label="containsFile")
    val File[*] contentFile;
    attr String name;
}

@gmf.node(label = "name",phantom="true")
class File {
    attr String name;
}