[basex-talk] Transaction Support

I am evaluating BaseX for my XML project. I need transaction support like - Start transaction - Run queries (read, write, update) - Commit or rollback transaction When I see the documentation, it lists Transaction Manager. But when I look at the details, I cannot find anything like that. Anyone can explain me how is the support, or is there an add-on or planned something? Best regards Reto, Frauenfeld, Schweiz