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diff --git a/subversion/libsvn_fs_base/bdb/strings-table.h b/subversion/libsvn_fs_base/bdb/strings-table.h
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+++ b/subversion/libsvn_fs_base/bdb/strings-table.h
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+/* strings-table.h : internal interface to `strings' table
+ *
+ * ====================================================================
+ *    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.
+ * ====================================================================
+ */
+
+#ifndef SVN_LIBSVN_FS_STRINGS_TABLE_H
+#define SVN_LIBSVN_FS_STRINGS_TABLE_H
+
+#define SVN_WANT_BDB
+#include "svn_private_config.h"
+
+#include "svn_io.h"
+#include "svn_fs.h"
+#include "../trail.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+/* This interface provides raw access to the `strings' table.  It does
+   not deal with deltification, undeltification, or skels.  It just
+   reads and writes strings of bytes. */
+
+
+/* Open a `strings' table in ENV.  If CREATE is non-zero, create
+ * one if it doesn't exist.  Set *STRINGS_P to the new table.
+ * Return a Berkeley DB error code.
+ */
+int svn_fs_bdb__open_strings_table(DB **strings_p,
+                                   DB_ENV *env,
+                                   svn_boolean_t create);
+
+
+/* Read *LEN bytes into BUF from OFFSET in string KEY in FS, as part
+ * of TRAIL.
+ *
+ * On return, *LEN is set to the number of bytes read.  If this value
+ * is less than the number requested, the end of the string has been
+ * reached (no error is returned on end-of-string).
+ *
+ * If OFFSET is past the end of the string, then *LEN will be set to
+ * zero. Callers which are advancing OFFSET as they read portions of
+ * the string can terminate their loop when *LEN is returned as zero
+ * (which will occur when OFFSET == length(the string)).
+ *
+ * If string KEY does not exist, the error SVN_ERR_FS_NO_SUCH_STRING
+ * is returned.
+ */
+svn_error_t *svn_fs_bdb__string_read(svn_fs_t *fs,
+                                     const char *key,
+                                     char *buf,
+                                     svn_filesize_t offset,
+                                     apr_size_t *len,
+                                     trail_t *trail,
+                                     apr_pool_t *pool);
+
+
+/* Set *SIZE to the size in bytes of string KEY in FS, as part of
+ * TRAIL.
+ *
+ * If string KEY does not exist, return SVN_ERR_FS_NO_SUCH_STRING.
+ */
+svn_error_t *svn_fs_bdb__string_size(svn_filesize_t *size,
+                                     svn_fs_t *fs,
+                                     const char *key,
+                                     trail_t *trail,
+                                     apr_pool_t *pool);
+
+
+/* Append LEN bytes from BUF to string *KEY in FS, as part of TRAIL.
+ *
+ * If *KEY is null, then create a new string and store the new key in
+ * *KEY (allocating it in POOL), and write LEN bytes from BUF
+ * as the initial contents of the string.
+ *
+ * If *KEY is not null but there is no string named *KEY, return
+ * SVN_ERR_FS_NO_SUCH_STRING.
+ *
+ * Note: to overwrite the old contents of a string, call
+ * svn_fs_bdb__string_clear() and then svn_fs_bdb__string_append().  */
+svn_error_t *svn_fs_bdb__string_append(svn_fs_t *fs,
+                                       const char **key,
+                                       apr_size_t len,
+                                       const char *buf,
+                                       trail_t *trail,
+                                       apr_pool_t *pool);
+
+
+/* Make string KEY in FS zero length, as part of TRAIL.
+ * If the string does not exist, return SVN_ERR_FS_NO_SUCH_STRING.
+ */
+svn_error_t *svn_fs_bdb__string_clear(svn_fs_t *fs,
+                                      const char *key,
+                                      trail_t *trail,
+                                      apr_pool_t *pool);
+
+
+/* Delete string KEY from FS, as part of TRAIL.
+ *
+ * If string KEY does not exist, return SVN_ERR_FS_NO_SUCH_STRING.
+ *
+ * WARNING: Deleting a string renders unusable any representations
+ * that refer to it.  Be careful.
+ */
+svn_error_t *svn_fs_bdb__string_delete(svn_fs_t *fs,
+                                       const char *key,
+                                       trail_t *trail,
+                                       apr_pool_t *pool);
+
+
+/* Copy the contents of the string referred to by KEY in FS into a new
+ * record, returning the new record's key in *NEW_KEY.  All
+ * allocations (including *NEW_KEY) occur in POOL.  */
+svn_error_t *svn_fs_bdb__string_copy(svn_fs_t *fs,
+                                     const char **new_key,
+                                     const char *key,
+                                     trail_t *trail,
+                                     apr_pool_t *pool);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* SVN_LIBSVN_FS_STRINGS_TABLE_H */