How about "nesting"? I think that's the thing most people mean when they say "indentation", we are just so much into visuals that it's easier for us to describe the looks and not the meaning.
-- RadomirDopieralski, 20 Sep 2007

Please see also //Indented paragraphs// in [[CreoleAdditions]].

-- [[YvesPiguet]], 2007-Sep-20

Yes, nesting divs - as described in //Indented paragraphs// [[CreoleAdditions]] - is the right way to do that in my eyes. However indentation is a dubious concept. Often people use indentation to structure a discussion. 
* PersonA
**Reply
***Reply
**Reply
*Person B

Now imagine this is done by divs only. Turn off CSS to see how the page occurs to a screenreader user or a user of a text browser. The page could be completely unreadable. So does it make sense to support indentation? Or does this call for a new semantic html markup which does not yet exist? I don't know, I would drop indentation therefore. On MoinMoin Wiki I did a workaround for this, see http://moinmoin.wikiwikiweb.de/MoinMoinBugs/1.6devCommentSectionsNotAccessibleByScreenreaderOrWithCssDisabled. This is not yet approved by screenreader users nor accessibility experts. But this also shows, that accessibility of indentation is out of reach of wiki markup only.
-- OliverSiemoneit, 2007-Sep-20