--- /dev/null	2015-04-26 17:31:22.381138994 -0700
+++ new/src/java.xml/share/classes/javax/xml/catalog/AltCatalog.java	2015-10-26 15:21:46.878730011 -0700
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package javax.xml.catalog;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+
+/**
+ * Represents an alternative catalog entry.
+ *
+ * @since 9
+ */
+class AltCatalog extends BaseEntry {
+    URI catalogURI;
+
+    AltCatalog(CatalogEntryType type, String base) {
+        super(type, base);
+    }
+
+    /**
+     * Set the catalog attribute. If the value of the catalog attribute is relative, it
+     * must be made absolute with respect to the base URI currently in effect.
+     *
+     * @param catalog The catalog attribute value.
+     * @throws CatalogException if converting to catalog URI failed
+     */
+    void setCatalog(String catalog) {
+        URL url = verifyURI("catalog", baseURI, catalog);
+        try {
+            catalogURI = url.toURI();
+        } catch (URISyntaxException ex) {
+            CatalogMessages.reportRunTimeError(CatalogMessages.ERR_OTHER, ex);
+        }
+
+    }
+
+    /**
+     * Returns the catalog attribute as an URI String.
+     * @return The value of the catalog attribute
+     */
+    String getCatalogId() {
+        return catalogURI.toASCIIString();
+    }
+
+    /**
+     * Returns the catalog attribute as an URI.
+     * @return The value of the catalog attribute
+     */
+    URI getCatalogURI() {
+        return catalogURI;
+    }
+
+    /**
+     * Matches the specified id with the entry. Returns the match if it
+     * is successful and the length of the start String is longer than the
+     * longest of any previous match.
+     *
+     * @param id The id to be matched.
+     * @param currentMatch The length of start String of previous match if any.
+     * @return The replacement URI if the match is successful, null if not.
+     */
+    public URI matchURI(String id, int currentMatch) {
+        return null;
+    }
+}