.. _glossary: ******** Glossary ******** .. glossary:: BNF grammar notation Backus-Naur Form notation. A meta-syntax for describing context-free grammars. See the `BNF `_ article on Wikipedia for more details. continued A *continued* gesture is just one that's been continued since the prior utterance. Such gestures should be marked with a tilde (``~``). disjoint prepositional phrase A prepositional phrase in which the object of the preposition is fronted (For example: *Is that what you were sitting on? Which box should we put it in?*)