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diff --git a/src/subtitle_asset.h b/src/subtitle_asset.h
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+/*
+    Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef LIBDCP_SUBTITLE_ASSET_H
+#define LIBDCP_SUBTITLE_ASSET_H
+
+#include "asset.h"
+#include "dcp_time.h"
+#include "subtitle_string.h"
+#include <libcxml/cxml.h>
+
+namespace dcp
+{
+
+class SubtitleString;	
+class FontNode;
+class TextNode;
+class SubtitleNode;
+class LoadFontNode;
+
+/** @class SubtitleAsset
+ *  @brief A parent for classes representing a file containing subtitles.
+ */
+class SubtitleAsset : public Asset
+{
+public:
+	SubtitleAsset ();
+	SubtitleAsset (boost::filesystem::path file);
+
+	bool equals (
+		boost::shared_ptr<const Asset>,
+		EqualityOptions,
+		NoteHandler note
+		) const;
+
+	std::string language () const {
+		return _language;
+	}
+
+	std::list<SubtitleString> subtitles_during (Time from, Time to) const;
+	std::list<SubtitleString> const & subtitles () const {
+		return _subtitles;
+	}
+
+	void add (SubtitleString);
+
+	void write_xml (boost::filesystem::path) const;
+	virtual Glib::ustring xml_as_string () const {
+		/* XXX: this should be pure virtual when SMPTE writing is implemented */
+		return "";
+	}
+
+	Time latest_subtitle_out () const;
+
+	virtual std::list<boost::shared_ptr<LoadFontNode> > load_font_nodes () const = 0;
+
+protected:
+	void parse_common (boost::shared_ptr<cxml::Document> xml, std::list<boost::shared_ptr<FontNode> > font_nodes);
+	
+	std::string pkl_type (Standard) const {
+		return "text/xml";
+	}
+
+	std::string asdcp_kind () const {
+		return "Subtitle";
+	}
+	
+	/* strangely, this is sometimes a string */
+	std::string _reel_number;
+	std::string _language;
+
+	std::list<SubtitleString> _subtitles;
+
+private:
+	struct ParseState {
+		std::list<boost::shared_ptr<FontNode> > font_nodes;
+		std::list<boost::shared_ptr<TextNode> > text_nodes;
+		std::list<boost::shared_ptr<SubtitleNode> > subtitle_nodes;
+	};
+
+	void maybe_add_subtitle (std::string text, ParseState const & parse_state);
+	
+	void examine_font_nodes (
+		boost::shared_ptr<const cxml::Node> xml,
+		std::list<boost::shared_ptr<FontNode> > const & font_nodes,
+		ParseState& parse_state
+		);
+	
+	void examine_text_nodes (
+		boost::shared_ptr<const cxml::Node> xml,
+		std::list<boost::shared_ptr<TextNode> > const & text_nodes,
+		ParseState& parse_state
+		);
+};
+
+}
+
+#endif