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diff --git a/lib/xmerl/src/xmerl_sgml.erl b/lib/xmerl/src/xmerl_sgml.erl
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+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2004-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+
+ %% Description  : Callback module for exporting XML to SGML.
+
+-module(xmerl_sgml).
+
+-export(['#xml-inheritance#'/0]).
+
+%% Note: we assume XML data, so all tags are lowercase!
+
+-export(['#root#'/4,
+	 '#element#'/5,
+	 '#text#'/1]).
+
+-import(xmerl_lib, [markup/3, find_attribute/2, export_text/1]).
+
+-include("xmerl.hrl").
+
+
+'#xml-inheritance#'() -> [].
+
+
+%% The '#text#' function is called for every text segment.
+
+'#text#'(Text) ->
+    export_text(Text).
+
+
+%% The '#root#' tag is called when the entire structure has been
+%% exported. It does not appear in the structure itself.
+
+'#root#'(Data, Attrs, [], _E) -> 
+    case find_attribute(header, Attrs) of
+	{value, Hdr} ->
+	    [Hdr, Data];
+	false ->
+	    Data
+    end.
+
+
+%% Note that SGML does not have the <Tag/> empty-element form.
+%% Furthermore, for some element types, the end tag may be forbidden -
+%% this can be handled by extending this module - see xmerl_otpsgml.erl
+%% for an example. (By default, we always generate the end tag, to make
+%% sure that the scope of a markup is not extended by mistake.)
+
+'#element#'(Tag, Data, Attrs, _Parents, _E) ->
+    markup(Tag, Attrs, Data).