Correct way to express in English that a string is encoded ... using UTF-8 ... with UTF-8 ... in UTF-8?

[Richard Wordingham via Unicode]

On Wed, 15 May 2019 05:56:54 -0700
Asmus Freytag via Unicode <unicode at unicode.org> wrote:

> On 5/15/2019 4:22 AM, Costello, Roger L. via Unicode wrote:
> Hello Unicode experts!
> 
> Which is correct:
> 
> (a) The input file contains a string. The string is encoded using
> UTF-8.
> 
> (b) The input file contains a string. The string is encoded with
> UTF-8.
> 
> (c) The input file contains a string. The string is encoded in UTF-8.
> 
> (d) Something else (what?)
> 
> /Roger
> 
> 
> I would say I've seen all three uses about equally.
> 
> If you search for each phrase, though, "in" comes up as the most
> frequent one.
> 
> That would make the last one, or simply "in UTF-8" (that is, without
> the "encoded") good choices for general audiences.

Additionally, the latter is about the current form of the string; the
others refer to its history, suggesting it might once have been
represented in some other way.

Richard.