On 8 Mar 2015, at 23:17 , Idris Samawi Hamid ادريس سماوي حامد  wrote
> 
On Sun, 08 Mar 2015 05:24:51 -0600, Robert Blackstone  
<blackstone.robert@gmail.com> wrote

>> I would like to use something like a "half-space" or small space in

> All the suggestions you have received are good, but ultimately you might  
> want to look at the spaces that Unicode provides, for example 202F. Not  
> sure sure which Unicode space character best suits your needs, but once  
> you have determined that, you can map it to one of the commands suggested  
> by others, or even define it to the exact width you want. For example, I  
> use imacron (U+012B) so much that it clashes with other characters. So I  
> map it to an alternate version that has a thinner macron:
> 
> \defineactivecharacter ī {\fontchar{imacron.alt}}
> 
> So what you want is a unicode space character that you can enter in your  
> editor, then define it in ConTeXt to exactly what you want.

and Hans Hagen <pragma@wxs.nl> wrote

> fyi: the list that Wolfgang shows with verbose space names ... these are 
> in fact unicode characters.

Thanks to both of you for pointing this out to me. 
Up till now I have never used unicode characters the way Idris proposes and I’m not sure that I already have the skills to make it work.  
For the moment I’m quite happy with the many possibilities that were given by Wolfgang and Hans.

Best regards,
Robert