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diff --git a/indra/newview/llsyntaxid.h b/indra/newview/llsyntaxid.h
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+/** 
+ * @file llsyntaxid.h
+ * @brief Contains methods to access the LSLSyntaxId feature and LSLSyntax capability
+ * to use the appropriate syntax file for the current region's LSL version.
+ * @author Ima Mechanique
+ *
+ * $LicenseInfo:firstyear=2013&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2013, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef LL_SYNTAXID_H
+#define LL_SYNTAXID_H
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llagent.h"
+#include "llenvmanager.h"
+#include "llhttpclient.h"
+#include "llsingleton.h"
+#include "llviewerregion.h"
+
+class LLSyntaxIdLSL : public LLSingleton<LLSyntaxIdLSL>
+{
+friend class fetchKeywordsFileResponder;
+
+public:
+	LLSyntaxIdLSL();
+
+	bool			checkSyntaxIdChanged();
+	bool			fetching();
+	std::string		getFileNameCurrent()	const { return mFileNameCurrent; }
+	ELLPath			getFilePath()			const { return mFilePath; }
+	std::string		getFileSpec()			const { return mFullFileSpec; }
+	LLSD			getKeywordsXML()		const { return mKeywordsXml; }
+	LLUUID			getSyntaxId()			const { return mSyntaxIdCurrent; }
+	bool			isDifferentVersion()	const { return mVersionChanged; }
+	bool			isInitialized()			const { return mInitialized; }
+
+	void			initialize();
+	bool			isLoaded() { return mLoaded; }
+
+	bool			isSupportedVersion(const LLSD& content);
+	void			setKeywordsXml(const LLSD& content) { mKeywordsXml = content; }
+	typedef			boost::signals2::signal<void()> file_fetched_signal_t;
+	boost::signals2::connection		addFileFetchedCallback(const file_fetched_signal_t::slot_type& cb);
+
+protected:
+	std::string		buildFileNameNew();
+	std::string		buildFullFileSpec();
+	void			fetchKeywordsFile();
+	void			loadDefaultKeywordsIntoLLSD();
+	void			loadKeywordsIntoLLSD();
+	void			setSyntaxId(LLUUID SyntaxId) { mSyntaxIdCurrent = SyntaxId; }
+	void			setFileNameCurrent(const std::string& name) { mFileNameCurrent = name; }
+	void			setFileNameDefault(const std::string& name) { mFileNameDefault = name; }
+	void			setFileNameNew(const std::string name) { mFileNameNew = name; }
+	
+private:
+	static const std::string CAPABILITY_NAME;
+	static const std::string FILENAME_DEFAULT;
+	static const std::string SIMULATOR_FEATURE;
+
+	bool		mInitialized;
+	LLSD		mKeywordsXml;
+	bool		mLoaded;
+	bool		mLoadFailed;
+	bool		mVersionChanged;
+	file_fetched_signal_t	mFileFetchedSignal;
+	
+	std::string		mCapabilityName;
+	std::string		mCapabilityURL;
+	std::string		mFileNameCurrent;
+	std::string		mFileNameDefault;
+	std::string		mFileNameNew;
+	ELLPath			mFilePath;
+	std::string		mFullFileSpec;
+	std::string		mSimulatorFeature;
+	LLUUID			mSyntaxIdCurrent;
+	LLUUID			mSyntaxIdNew;
+};
+
+
+class fetchKeywordsFileResponder : public LLHTTPClient::Responder
+{
+public:
+	std::string	mFileSpec;
+
+	/**
+	 * @brief fetchKeywordsFileResponder
+	 * @param filespec	File path and name of where to save the returned data
+	 */
+	fetchKeywordsFileResponder(std::string filespec);
+
+	void errorWithContent(U32 status,
+						const std::string& reason,
+						const LLSD& content);
+
+	/**
+	 * @brief Checks the returned LLSD for version and stores it in the LLSyntaxIdLSL object.
+	 * @param content_ref The returned LLSD.
+	 */
+	void result(const LLSD& content_ref);
+
+	/**
+	 * @brief Saves the returned file to the location provided at instantiation.
+	 *			Could be extended to manage cached entries.
+	 * @param content_ref	The LSL syntax file for the sim.
+	 */
+	void cacheFile(const LLSD& content_ref);
+};
+
+#endif // LLSYNTAXID_H