Fuji Xerox EDMICS-RLC

import magic
# Libmagic lacks definitions for the proprietary EDMICS wrapper. It will likely identify the file as 'application/octet-stream'.
print(magic.from_file('scanned_document.rlc', mime=True))

const mime = require('mime');
// Many JS MIME libraries map .rlc to image/vnd.fujixerox.edmics-rlc purely based on historical IANA registry associations
console.log(mime.getType('scanned_document.rlc')); // Likely outputs 'image/vnd.fujixerox.edmics-rlc'

import "net/http"
// The standard net/http library cannot detect EDMICS files internally via byte sniffing. You must rely on extension string matching.

$mime = mime_content_type('scanned_document.rlc');
echo $mime; // Standard server environments will map this to application/octet-stream