My Picard file naming scheme

This is my MusicBrainz Picard file naming scheme.
See this page for details.
$noop(Various Artist Albums)
$if($eq(%compilation%,1),
$if2(%albumartist%,%artist%)/
$left($if2(%originaldate%,%date%),4) %album%/
$if($gt(%totaldiscs%,1),$if(%discsubtitle%,CD %discnumber%: %discsubtitle%/, CD %discnumber%/),)
$num(%tracknumber%,2). %artist% - %title%,

$noop(Single Artist Albums)

$firstalphachar($if($eq($left($lower(%artist%),4),the ),
$right($upper(%artist%),$sub($len(%artist%),4)),$upper(%artist%)))/

$noop(Artist)
$if2(%albumartist%,%artist%)/

$if(%album%,
$noop(Album Tracks)
$if($eq($or(%originaldate%,%date%),1),
$left($if2(%originaldate%,%date%),4) %album%/,
%album%)/
$if($gt(%totaldiscs%,1),$if(%discsubtitle%,CD %discnumber%: %discsubtitle%/, CD %discnumber%/),)
$num(%tracknumber%,2). %title%,

$noop(Non-Album Tracks)
%title%
)

)