[xep-support] Support of special types of spaces

[David Tolpin]

> Again, its width is *supposed* to be font-dependent.  Whether it's  
> in many fonts or not is irrelevant.

But the original poster does not think so. The original poster  
advocates the approach that the typographical spaces should be  
computed if they are not in the font.


> All XEP has to do is accept that several forms of space are fixed- 
> width, and thus should not be subject to variation due to  
> justification.  The spaces can be inserted using entity names or  
> unicode character values.

The previous space-related discussion  was about NBSP. The discussion  
has been as emotional as this one, and the community stood strong  
behind the viewpoint that no-break white space should vary due to  
justification.

The only thing that can be done to make programs like XEP usable is  
to strongly discourage the use of typographical spaces until there is  
a clear and unambiguous specification of what to do with them. There  
are better means to accomplish good print quality; you don't have to  
use four-per-em and six-per-em to get a 5/12em white space these days.

David
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