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diff --git a/libjava/gnu/xml/dom/DomNotation.java b/libjava/gnu/xml/dom/DomNotation.java
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+/* DomNotation.java -- 
+   Copyright (C) 1999,2000,2001,2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.dom;
+
+import org.w3c.dom.Notation;
+
+/**
+ * <p> "Notation" implementation.  This is a non-core DOM class, supporting
+ * the "XML" feature. </p>
+ *
+ * <p> Although unparsed entities using this notation can be detected using
+ * DOM, neither NOTATIONS nor ENTITY/ENTITIES attributes can be so detected.
+ * More, there is no portable way to construct a Notation node, so there's
+ * no way that vendor-neutral DOM construction APIs could even report a
+ * NOTATION used to identify the intended meaning of a ProcessingInstruction.
+ * </p>
+ *
+ * <p> In short, <em>avoid using this DOM functionality</em>.
+ *
+ * @see DomDoctype
+ * @see DomEntity
+ * @see DomPI
+ *
+ * @author David Brownell 
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class DomNotation
+  extends DomExtern
+  implements Notation
+{
+    
+  /**
+   * Constructs a Notation node associated with the specified document,
+   * with the specified descriptive data.  Note that at least one of
+   * the PUBLIC and SYSTEM identifiers must be provided; unlike other
+   * external objects in XML, notations may have only a PUBLIC identifier.
+   *
+   * <p>This constructor should only be invoked by a DomDoctype object
+   * as part of its declareNotation functionality, or through a subclass
+   * which is similarly used in a "Sub-DOM" style layer. 
+   *
+   * @param owner The document with which this notation is associated
+   * @param name Name of this notation
+   * @param publicId If non-null, provides the notation's PUBLIC identifier
+   * @param systemId If non-null, rovides the notation's SYSTEM identifier
+   */
+  protected DomNotation(DomDocument owner,
+                        String name,
+                        String publicId,
+                        String systemId)
+  {
+    super(NOTATION_NODE, owner, name, publicId, systemId);
+    makeReadonly();
+  }
+  
+  /**
+   * The base URI of an external entity is its system ID.
+   * The base URI of an internal entity is the parent document's base URI.
+   * @since DOM Level 3 Core
+   */
+  public String getBaseURI()
+  {
+    String systemId = getSystemId();
+    return (systemId == null) ? owner.getBaseURI() : systemId;
+  }
+  
+}
+