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diff --git a/gnu/xml/validation/datatype/NegativeIntegerType.java b/gnu/xml/validation/datatype/NegativeIntegerType.java
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+++ b/gnu/xml/validation/datatype/NegativeIntegerType.java
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+/* NegativeIntegerType.java -- 
+   Copyright (C) 2006  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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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.validation.datatype;
+
+import java.math.BigInteger;
+import javax.xml.XMLConstants;
+import javax.xml.namespace.QName;
+import org.relaxng.datatype.DatatypeException;
+import org.relaxng.datatype.ValidationContext;
+
+/**
+ * The XML Schema negativeInteger type.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class NegativeIntegerType
+  extends AtomicSimpleType
+{
+
+  static final int[] CONSTRAINING_FACETS = {
+    Facet.TOTAL_DIGITS,
+    Facet.FRACTION_DIGITS,
+    Facet.PATTERN,
+    Facet.WHITESPACE,
+    Facet.ENUMERATION,
+    Facet.MAX_INCLUSIVE,
+    Facet.MAX_EXCLUSIVE,
+    Facet.MIN_INCLUSIVE,
+    Facet.MIN_EXCLUSIVE
+  };
+
+  NegativeIntegerType()
+  {
+    super(new QName(XMLConstants.W3C_XML_SCHEMA_NS_URI, "negativeInteger"),
+          TypeLibrary.NON_POSITIVE_INTEGER);
+  }
+
+  public int[] getConstrainingFacets()
+  {
+    return CONSTRAINING_FACETS;
+  }
+
+  public void checkValue(String value, ValidationContext context)
+    throws DatatypeException
+  {
+    super.checkValid(value, context);
+    int len = value.length();
+    if (len == 0)
+      throw new DatatypeException(0, "invalid negative integer value");
+    for (int i = 0; i < len; i++)
+      {
+        char c = value.charAt(i);
+        if (c == '-')
+          {
+            if (i == 0)
+              continue;
+          }
+        else if (c >= 0x30 && c <= 0x39)
+            continue;
+        throw new DatatypeException(i, "invalid negative integer value");
+      }
+  }
+  
+  public Object createValue(String literal, ValidationContext context) {
+    try
+      {
+        return new BigInteger(literal);
+      }
+    catch (NumberFormatException e)
+      {
+        return null;
+      }
+  }
+  
+}
+