As for what I mean by ANSI, I really don't know.

Welcome to the wonderful world of character encodings!

What you may mean is the ASCII character encoding. This is an old, 7-bit encoding with the most significant bit (bit 7) always 0. One neat thing about the newer UTF-8 encoding (some people say it's the only neat thing) is that all valid ASCII characters are automatically valid UTF-8 characters. Unfortunately, things quickly go to pieces after that; not all valid UTF-8 characters are valid ASCII, and any mapping of UTF-8 to ASCII is totally arbitrary. Oh, well...