4.8 data ======== The ‘data’ scheme, defined in RFC 2397, contains MIME data in the URL itself. Such URLs have the form data:[MEDIA-TYPE][;BASE64],DATA MEDIA-TYPE is a MIME ‘Content-Type’ string, possibly including parameters. It defaults to ‘text/plain;charset=US-ASCII’. The ‘text/plain’ can be omitted but the charset parameter supplied. If ‘;base64’ is present, the DATA are base64-encoded.