--- src/xmlcomp/org/apache/xmlbeans/impl/tool/SchemaCompiler.java.orig	2015-11-11 15:58:46.578486000 +0000
+++ src/xmlcomp/org/apache/xmlbeans/impl/tool/SchemaCompiler.java	2015-11-11 15:59:05.351486000 +0000
@@ -217,8 +217,9 @@
         boolean debug = (cl.getOpt("debug") != null);
 
         String allowmdef = cl.getOpt("allowmdef");
-        Set mdefNamespaces = (allowmdef == null ? Collections.EMPTY_SET :
-                new HashSet(Arrays.asList(XmlListImpl.split_list(allowmdef))));
+        Set mdefNamespaces = Collections.EMPTY_SET;
+        // Set mdefNamespaces = (allowmdef == null ? Collections.EMPTY_SET :
+        //         new HashSet(Arrays.asList(XmlListImpl.split_list(allowmdef))));
 
         List extensions = new ArrayList();
         if (cl.getOpt("extension") != null) {