ParserMarket

ParserMarket is a feature of the MoinMoin Market Model. See for example http://twistedmatrix.com/users/jh.twistd/moin/moin.cgi/ParserMarket

With this, it is ridiculously easy to support an evolving wikitext standard.

TikiWiki and MediaWiki would be stupid not to copy this architecture - see Alternate wiki-implementations for more requirements and comparisons.