Packets with incorrect capitalization (invalid)

xpacket in header:
<?Xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?> <?xpacket end='w'?>

begin attribute in header:
<?xpacket Begin='' id='W5M0MpCehiHzreSzNTczkc9d'?> <?xpacket end='w'?>

id attribute in header:
<?xpacket begin='' Id='W5M0MpCehiHzreSzNTczkc9d'?> <?xpacket end='w'?>

xpacket in trailer:
+++hG<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?> <?Xpacket end='w'?>
<?xpacket end='w'?>---tG

end attribute in trailer:
+++hG<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?> <?xpacket End='w'?>
<?xpacket end='w'?>---tG