diff -r fd16c54261b3 -r 90ce3da70b43 jdk/src/share/classes/javax/xml/crypto/XMLStructure.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/javax/xml/crypto/XMLStructure.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+/*
+ * $Id: XMLStructure.java,v 1.3 2005/05/10 15:47:42 mullan Exp $
+ */
+package javax.xml.crypto;
+
+/**
+ * A representation of an XML structure from any namespace. The purpose of
+ * this interface is to group (and provide type safety for) all
+ * representations of XML structures.
+ *
+ * @author Sean Mullan
+ * @author JSR 105 Expert Group
+ * @since 1.6
+ */
+public interface XMLStructure {
+
+    /**
+     * Indicates whether a specified feature is supported.
+     *
+     * @param feature the feature name (as an absolute URI)
+     * @return <code>true</code> if the specified feature is supported,
+     *    <code>false</code> otherwise
+     * @throws NullPointerException if <code>feature</code> is <code>null</code>
+     */
+    boolean isFeatureSupported(String feature);
+}