--- a
+++ b/src/rcldb/rclvalues.h
@@ -0,0 +1,29 @@
+#ifndef _RCLVALUES_H_INCLUDED_
+#define _RCLVALUES_H_INCLUDED_
+/* Copyright (C) 2004-2018 J.F.Dockes
+ *   This program 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 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#include <string>
+
+namespace Rcl {
+
+extern void add_field_value(Xapian::Document& xdoc, const FieldTraits& ft,
+                            const std::string& data);
+extern std::string convert_field_value(const FieldTraits& ft,
+                                       const std::string& data);
+}
+
+#endif /* _RCLVALUES_H_INCLUDED_ */