),
negotiate_variant(
"id"=>"application/xhtml+xml",
"content-type"=>"application/xhtml+xml",
"qs"=>0.6,
"charset"=>$client_charset,
),
negotiate_variant(
"id"=>"application/xhtml+xml",
"content-type"=>"application/xhtml+xml",
"qs"=>0.6,
"charset"=>$client_charset,