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RE: [xml-dev] UTF-8 Question: e with acute accent should require two bytes, right?
- From: "Michael Kay" <mike@saxonica.com>
- To: "'Costello, Roger L.'" <costello@mitre.org>,<xml-dev@lists.xml.org>
- Date: Fri, 28 Sep 2007 16:22:21 +0100
Hex editors show you what they've got in memory, not what's on the disk. So
this tells you that the editor has converted the data to iso-8859-1 or
something similar for processing in memory.
Michael Kay
http://www.saxonica.com/
> -----Original Message-----
> From: Costello, Roger L. [mailto:costello@mitre.org]
> Sent: 28 September 2007 16:13
> To: xml-dev@lists.xml.org
> Subject: [xml-dev] UTF-8 Question: e with acute accent should
> require two bytes, right?
>
> Hi Folks,
>
> Consider this element:
>
> <title>My Resumé</title>
>
> Notice: é (the character "e" with an acute accent). It is U-00E9
>
> Since its code point is greater than U+0080, it requires more
> than one byte.
>
> Hex E9 = Decimal 233. This has the binary: 11101001
>
> I believe that it is encoded in UTF-8 as two bytes:
>
> 11000011 10101001
>
> These bytes correspond to hex C3 and hex A9.
>
> Thus, é should be encoded in UTF-8 as:
>
> C3A9
>
> The code points of the other characters (My Resum) are all
> less than U-0080, and so the UTF-8 encoding of those
> characters should be only one byte.
>
> So, this is what I believe should be the bytes:
>
> M y R e s u m é
> 4D79 2052 6573 756D C3A9
>
> Do you agree?
>
> However, when I view the bytes in my hex editor I get this:
>
> M y R e s u m é
> 4D79 2052 6573 756D E9
>
> Notice that é uses only one byte.
>
> Something is wrong. Here's what I think may be wrong:
> - the editor that I am using to display the hex values is
> displaying the code points and not the hex values. However, I
> have now tried two editors, and they both display the same
> thing (E9). So perhaps the editor isn't the problem.
> Perhaps I'm the problem, and am misunderstanding something. Help!
>
> /Roger
>
>
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