[xwiki-users] List of special characters to avoid in page title

Hi, Using XWiki Enterprise 5.2, standalone install. We notice dots (.) in page titles are escaped in HSQLDB (e.g. when I cat the contents of xwiki_db.log and grep something particular in the article I'm seeking) : INSERT INTO XWIKIDOC VALUES(...,'Ressources.Some page title with accented characters in French (2007)\. Plan de rel\u00e8ve bla bla de salle d''op\u00e9ration', We can see all accented characters and special characters like the apostrophe in the last word ("d'opération") are escaped, but then the dot in the title next to "(2007)" gets escaped too. I guess the reason it is escaped in the title is that the dot is used as a separator for the wiki hierarchy (Resources.Some page really is like the directory structure in our XWiki instance, that is Ressources/Some page). Is that so ? Can we change that behaviour or do I have to tell my users to stop using dots (and possibly other special characters ?) in page titles ? Thanx for pointers, Yves Moisan