DokuWiki can convert various character combinations to their typographical equivalent.

e.g.

<<  to « 
>>  to » 
=>  to ⇒

see also typography.

Details of the conversions are stored in the conf/entities.conf file. You can add your own entity conversions by creating a conf/entities.local.conf file and placing your conversions in that file. It is possible to modify Dokuwiki's conf/entities.conf file, however this could result in your changes being overwritten when upgrading Dokuwiki.

It seems that it is possible to use this table to adapt DokuWiki to some French typography rules that necessitate non-breaking spaces before or after some punctuation marks. For example, in the conf/entities.conf file, I write rules like this:

<< &laquo;&nbsp;
? &nbsp;?
: &nbsp;:
! &nbsp;!
; &nbsp;;

To use typography for esperanto x-writing:

cx	─Й
Cx	─И
CX	─И
gx	─Э
Gx	─Ь
GX	─Ь
hx	─е
Hx	─д
HX	─д
jx	─╡
Jx	─┤
JX	─┤	
sx	┼Э
Sx	┼Ь
SX	┼Ь
ux	┼н
Ux	┼м
UX	┼м