xml gnome wallpaper
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
<wallpapers>
<wallpaper deleted="false">
<name>Wallpaper Name</name>
<filename>Path/To/Image</filename>
<options>zoom</options>
</wallpaper>
</wallpapers>