This paper describes how a task specific grammar can be implemented using a dedicated “NLP” Augmented Phrase Structure (APS) grammar formalism. The APS is used for generation of appropriate semantic frames to be passed on to the dialogue manager of a spoken dialogue system. In a derived form, conforming to the HTK Standard Lattice format, the same APS may be used for constraining the approved speech recogniser grapHvite by Entropics. APS and HTK (standard lattice) are just two of several NLP and recognition grammar formats supported by the CPK NLP Suite for Spoken Language Understanding. The suite can be downloaded (in C++ source code) for research and other non-commercial use at the web address http://www.cpk.auc.dk/~tb/nlpsuite.