as of OpenSong v1.5.1
Copyright 2003-2009 Sean Lickfold.
Released under the terms of the GPL.

OpenSong Song files are standard XML files with the following layout:

<song>

<title>
<author>
<copyright>
<hymn_number>
<presentation>
<ccli>
<capo print="false">
<key>
<aka>
<key_line>
<user1>
<user2>
<user3>
<theme>
<tempo>
<time_sig>
<lyrics>
<style index="default_style">

</song>