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diff --git a/include/util_charset.h b/include/util_charset.h
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/**
+ * @file  util_charset.h
+ * @brief charset conversion
+ *
+ * @defgroup APACHE_CORE_CHARSET Charset Conversion
+ * @ingroup  APACHE_CORE
+ * 
+ * These are the translation handles used to translate between the network
+ * format of protocol headers and the local machine format.
+ *
+ * For an EBCDIC machine, these are valid handles which are set up at
+ * initialization to translate between ISO-8859-1 and the code page of
+ * the source code.\n
+ * For an ASCII machine, they are undefined.
+ * 
+ * @see ap_init_ebcdic()
+ * @{
+ */
+
+#ifndef APACHE_UTIL_CHARSET_H
+#define APACHE_UTIL_CHARSET_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "apr.h"
+
+#if APR_CHARSET_EBCDIC || defined(DOXYGEN)
+
+#include "apr_xlate.h"
+
+/**
+ * On EBCDIC machine this is a translation handle used to translate the
+ * headers from the local machine format to ASCII for network transmission.
+ * @note On ASCII system, this variable does <b>not</b> exist.
+ * So, its use should be guarded by \#if APR_CHARSET_EBCDIC.
+ */
+extern apr_xlate_t *ap_hdrs_to_ascii;
+
+/**
+ * On EBCDIC machine this is a translation handle used to translate the
+ * headers from ASCII to the local machine format after network transmission.
+ * @note On ASCII system, this variable does <b>not</b> exist.
+ * So, its use should be guarded by \#if APR_CHARSET_EBCDIC.
+ */
+extern apr_xlate_t *ap_hdrs_from_ascii;
+
+#endif  /* APR_CHARSET_EBCDIC */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* !APACHE_UTIL_CHARSET_H */
+/** @} */