--- a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/util/DocPaths.java	Tue Apr 10 23:32:54 2018 +0200
+++ b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/util/DocPaths.java	Tue Apr 10 15:05:10 2018 -0700
@@ -49,6 +49,8 @@
         moduleSeparator = useModuleDirectories ? "/module-" : "-";
     }
 
+    public static final DocPath DOT_DOT = DocPath.create("..");
+
     /** The name of the file for all classes, without using frames, when --no-frames is specified. */
     public static final DocPath ALLCLASSES = DocPath.create("allclasses.html");