Added section on Main Features

README.md

@@ -1,7 +1,7 @@
 # audiveris
 
 This repository contains source code for the latest generation of Audiveris optical
-music recognition engine.
+music recognition (OMR) engine.
 
 ## CAUTION!
 
@@ -10,6 +10,21 @@ Github. This will take approx. two weeks. We won't be able to accept pull
 requests until this transition is finished (this message will disappear then).
 Thank you for your patience!**
 
+## Main features
+
+As opposed to Audiveris [earlier generation][6], which was a stand-alone OMR application composed
+of an engine and a (limited) user interface, this repository is focused on the OMR engine.
+
+The internals of OMR engine are made publicly available, either directly by XML-based ".omr" 
+project files or via the Java API of this software.
+
+The engine can directly export data using [MusicXML][8] 3.0 format, via an integrated exporter.
+Other exporters could build upon the engine to support other target formats.
+
+NOTA: The engine provides a small integrated UI which is meant for the developer to analyze, 
+tune or train the various parts of the engine, but not to correct the final score.
+Full GUIs, meant for the end-user, are expected to be provided by external editors.
+
 ## Building and running
 
 First of all, you'll need the following dependencies installed and working from
@@ -50,4 +65,7 @@ Developers are encouraged to read our (still incomplete) [developers documentati
 [2]: https://github.com/tesseract-ocr/tesseract
 [3]: https://github.com/tesseract-ocr/tesseract/wiki
 [4]: https://www.freetype.org
-[5]: https://github.com/Audiveris/audiveris-v5/wiki
+[5]: https://github.com/Audiveris/audiveris/wiki
+[6]: https://github.com/Audiveris/audiveris-eg
+[7]: https://github.com/Audiveris
+[8]: http://www.musicxml.com/