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diff --git a/src/share/classes/com/sun/org/apache/xerces/internal/impl/xs/XSImplementationImpl.java b/src/share/classes/com/sun/org/apache/xerces/internal/impl/xs/XSImplementationImpl.java
new file mode 100644
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+++ b/src/share/classes/com/sun/org/apache/xerces/internal/impl/xs/XSImplementationImpl.java
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+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Copyright 2003,2004 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.sun.org.apache.xerces.internal.impl.xs;
+
+import com.sun.org.apache.xerces.internal.dom.CoreDOMImplementationImpl;
+import com.sun.org.apache.xerces.internal.dom.DOMMessageFormatter;
+import com.sun.org.apache.xerces.internal.impl.xs.util.StringListImpl;
+import com.sun.org.apache.xerces.internal.xs.StringList;
+import com.sun.org.apache.xerces.internal.xs.XSException;
+import com.sun.org.apache.xerces.internal.xs.XSImplementation;
+import com.sun.org.apache.xerces.internal.xs.XSLoader;
+import org.w3c.dom.DOMImplementation;
+
+
+/**
+ * Implements XSImplementation interface that allows one to retrieve an instance of <code>XSLoader</code>.
+ * This interface should be implemented on the same object that implements
+ * DOMImplementation.
+ *
+ * @xerces.internal
+ *
+ * @author Elena Litani, IBM
+ */
+public class XSImplementationImpl extends CoreDOMImplementationImpl
+                                                                  implements XSImplementation {
+
+    //
+    // Data
+    //
+
+    // static
+
+    /** Dom implementation singleton. */
+    static XSImplementationImpl singleton = new XSImplementationImpl();
+
+    //
+    // Public methods
+    //
+
+    /** NON-DOM: Obtain and return the single shared object */
+    public static DOMImplementation getDOMImplementation() {
+        return singleton;
+    }
+
+    //
+    // DOMImplementation methods
+    //
+
+    /**
+     * Test if the DOM implementation supports a specific "feature" --
+     * currently meaning language and level thereof.
+     *
+     * @param feature      The package name of the feature to test.
+     * In Level 1, supported values are "HTML" and "XML" (case-insensitive).
+     * At this writing, com.sun.org.apache.xerces.internal.dom supports only XML.
+     *
+     * @param version      The version number of the feature being tested.
+     * This is interpreted as "Version of the DOM API supported for the
+     * specified Feature", and in Level 1 should be "1.0"
+     *
+     * @return    true iff this implementation is compatable with the specified
+     * feature and version.
+     */
+    public boolean hasFeature(String feature, String version) {
+
+        return (feature.equalsIgnoreCase("XS-Loader") && (version == null || version.equals("1.0")) ||
+                super.hasFeature(feature, version));
+    } // hasFeature(String,String):boolean
+
+
+
+    /* (non-Javadoc)
+     * @see com.sun.org.apache.xerces.internal.xs.XSImplementation#createXSLoader(com.sun.org.apache.xerces.internal.xs.StringList)
+     */
+    public XSLoader createXSLoader(StringList versions) throws XSException {
+        XSLoader loader = new XSLoaderImpl();
+        if (versions == null){
+                        return loader;
+        }
+        for (int i=0; i<versions.getLength();i++){
+                if (!versions.item(i).equals("1.0")){
+                                String msg =
+                                        DOMMessageFormatter.formatMessage(
+                                                DOMMessageFormatter.DOM_DOMAIN,
+                                                "FEATURE_NOT_SUPPORTED",
+                                                new Object[] { versions.item(i) });
+                                throw new XSException(XSException.NOT_SUPPORTED_ERR, msg);
+                }
+        }
+        return loader;
+    }
+
+    /* (non-Javadoc)
+     * @see com.sun.org.apache.xerces.internal.xs.XSImplementation#getRecognizedVersions()
+     */
+    public StringList getRecognizedVersions() {
+        StringListImpl list = new StringListImpl(new String[]{"1.0"}, 1);
+        return list;
+    }
+
+} // class XSImplementationImpl