--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/javax/xml/validation/Schema.java	Thu Apr 12 08:38:26 2012 -0700
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2003, 2005, 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.validation;
+
+/**
+ * Immutable in-memory representation of grammar.
+ *
+ * <p>
+ * This object represents a set of constraints that can be checked/
+ * enforced against an XML document.
+ *
+ * <p>
+ * A {@link Schema} object is thread safe and applications are
+ * encouraged to share it across many parsers in many threads.
+ *
+ * <p>
+ * A {@link Schema} object is immutable in the sense that it shouldn't
+ * change the set of constraints once it is created. In other words,
+ * if an application validates the same document twice against the same
+ * {@link Schema}, it must always produce the same result.
+ *
+ * <p>
+ * A {@link Schema} object is usually created from {@link SchemaFactory}.
+ *
+ * <p>
+ * Two kinds of validators can be created from a {@link Schema} object.
+ * One is {@link Validator}, which provides highly-level validation
+ * operations that cover typical use cases. The other is
+ * {@link ValidatorHandler}, which works on top of SAX for better
+ * modularity.
+ *
+ * <p>
+ * This specification does not refine
+ * the {@link java.lang.Object#equals(java.lang.Object)} method.
+ * In other words, if you parse the same schema twice, you may
+ * still get <code>!schemaA.equals(schemaB)</code>.
+ *
+ * @author <a href="mailto:Kohsuke.Kawaguchi@Sun.com">Kohsuke Kawaguchi</a>
+ * @see <a href="http://www.w3.org/TR/xmlschema-1/">XML Schema Part 1: Structures</a>
+ * @see <a href="http://www.w3.org/TR/xml11/">Extensible Markup Language (XML) 1.1</a>
+ * @see <a href="http://www.w3.org/TR/REC-xml">Extensible Markup Language (XML) 1.0 (Second Edition)</a>
+ * @since 1.5
+ */
+public abstract class Schema {
+
+    /**
+     * Constructor for the derived class.
+     *
+     * <p>
+     * The constructor does nothing.
+     */
+    protected Schema() {
+    }
+
+    /**
+     * Creates a new {@link Validator} for this {@link Schema}.
+     *
+     * <p>A validator enforces/checks the set of constraints this object
+     * represents.</p>
+     *
+     * <p>Implementors should assure that the properties set on the
+     * {@link SchemaFactory} that created this {@link Schema} are also
+     * set on the {@link Validator} constructed.</p>
+     *
+     * @return
+     *      Always return a non-null valid object.
+     */
+    public abstract Validator newValidator();
+
+    /**
+     * Creates a new {@link ValidatorHandler} for this {@link Schema}.
+     *
+     * <p>Implementors should assure that the properties set on the
+     * {@link SchemaFactory} that created this {@link Schema} are also
+     * set on the {@link ValidatorHandler} constructed.</p>
+     *
+     * @return
+     *      Always return a non-null valid object.
+     */
+    public abstract ValidatorHandler newValidatorHandler();
+}