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.