[oXygen-user] How to type an UTF8 symbol in text as well as in author mode

Eliot Kimber ekimber at contrext.com
Mon Feb 19 09:28:54 CST 2018

The (hex.) column is the UTF-8 encoding of the character, that is, the sequence of bytes.


The actual Unicode character number is the value in the first column, e.g., \u2190.


So you should be able to type 2190 and get the character you want.


Unicode is the character set and the character numbers (code points) are independent of how the characters are encoded.


The encoding is how the characters are translated to bytes when written as a byte sequence.


The Unicode standard defines a number of encodings, including UTF-8 and UTF-16.


So there are not “UTF-8 characters”, only UTF-8 encodings of Unicode characters.


The UTF-8 encoding was designed so that it is identical to ASCII for the first 127 or 255 characters (depending on which version of ASCII you’re looking at). But after character 255 it takes at least 3 bytes to encode a character.






Eliot Kimber




From: oXygen-user <oxygen-user-bounces at oxygenxml.com> on behalf of Bernhard Kleine <bernhard.kleine at gmx.net>
Date: Monday, February 19, 2018 at 9:17 AM
To: <oxygen-user at oxygenxml.com>
Subject: Re: [oXygen-user] How to type an UTF8 symbol in text as well as in author mode


The UTF8 table at http://www.utf8-zeichentabelle.de/unicode-utf8-table.pl?start=8592 shows this first four lines.

U+2190←e2 86 90LEFTWARDS ARROW
U+2191↑e2 86 91UPWARDS ARROW
U+2193↓e2 86 93DOWNWARDS ARROW

When I tried to change a utf8 hex value in a simple doc, using Ctrl-Shift-X, I get:

(not a valid hexadecimal sequence to change)

I also tried the 0x1F926 from Bens example below. The same error. What do I wrong?

These arrows would be a good example since they will be used.




Am 19.02.2018 um 10:03 schrieb Oxygen XML Editor Support (Radu Coravu) :


Thanks for the reminder Ben. 
Indeed I forgot about this feature in Oxygen: 


which basically allows you to type away the hex digits in Oxygen and then invoke the special "Convert Hexadecimal Sequence to Character" action. 


Radu Coravu 
<oXygen/>  XML Editor, Schema Editor and XSLT Editor/Debugger 

On 2/19/2018 10:56 AM, Ben McGinnes wrote: 

On Mon, Feb 19, 2018 at 09:33:28AM +0200, Oxygen XML Editor Support (Radu Coravu)  wrote: 

Hi Bernhard, 

It seems that for "nbsp" which has the decimal equivalent "160" you would 
need to type "ALT" and then "0160", that leading "0" seems to be important. 
The same probably for all other characters, type their decimal equivalent 
but it needs to be four typed figures. 

Oh, how quickly we forget certain things.  :) 

oXygen has had the ability to enter UTF-8 characters in the first 
plane by their four character hexadecimal code point value since 
version 17.1.  I can't recall what the default hotkey is for invoking 
it because I changed mine (back) to F8 as soon as I installed that 
version.  I believe I've still got the plugin you guys provided me 
during my trial period for 17.0. 

Anyway, if Bernhard is happy with using hex instead of int, that's the 
solution instead of the Windows alt sequences (or the Mac alt/option 
sequences either, for that matter). 


bash-4.4$ unum.pl 0x1f926 
   Octal  Decimal      Hex        HTML    Character   Unicode 
 0374446   129318  0x1F926   🤦    "🤦"         FACE PALM 

Obviously some of us can see that character properly and some can't, 
but you all know which it is. 


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