Wolf Eichler wrote:

> Q1) What is the character potential of the mail client editor? That 
> is: what subset of Unicode can be entered and/or depicted by the mail 
> editor / mail displayer?

IIRC, the entire Unicode set.

> Q2) Is the set of Q1 dependent on the platform and its default 
> character set? If yes, how?

The character set is taken into account when you send the message, if 
you have asked the message to be sent in a character set that doesn't 
contain the character you want it will be substituted. For instance, the 
� character would be replaced by EUR if we were using the ISO-8859-1 
character set. However, this message is in ISO-8859-15 which I hope 
should let you see the character correctly.

> Q3) What instance generates the character images (on screen) for HTML 
> clients when local platforms' native character set is far narrower 
> than the HTML charset?

I think that Mozilla will subsitute for missing characters.

> Q4) What defines the relation between the set of Q1 and the platform's 
> input device, i.e. the keyboard?

In the HTML editor, any unicode character may be entered in decimal form 
using Insert/HTML and a &#nnnn; code. In the plain text editor, you can 
paste in unicode copied from elsewhere, such as the browser, editor, or 
the Character Map utility.


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