Thank Cunctator & Kurt,
In fact I just start to use it today :oP You can see an exemple in our Bistro (equivalant to english "village_pump"). http://fr.wikipedia.org/wiki/Wikip%E9dia:Le_Bistro
I understand the need of keep the syntax as simple as possible. I don't want to replace the actual ---- by a more complexe syntax, but I may be happy to be able full bar (----) AND small bar. If you prefere, we can use only one small bar as <--> (without parameters)
Wiki: <--> HTML: <hr align="center" width="33%">
or <---->
Aoineko