Junghans, Riehle, et al. developed an EBNF Grammar for Wiki Creole 1.0. 

It is available as a [[http://www.riehle.org/2008/01/09/an-ebnf-grammar-for-wiki-creole-10/|technical report]] as well as [[http://www.riehle.org/wiki-creole/|stand-alone files]].