I am trying to make (and understand!) column groups for html export According to http://orgmode.org/manual/Column-groups.html having a line starting / and then showing < for group start and group end makes column groups.
When I make and org file containing these 4 lines:
* head | / | < > | | < > | | some text | and some more | d e | fg | | | | | |
all that happens on export is that the / < > etc literally appear in the export!