Besides a reduction in quantity, semantic restrictions in special languages make it possible to describe sublanguages in a more specific and precise way. Based on knowledge of known goals within the domain and on a linguistic analysis of the collected corpus, domain-relevant semantic roles have been defined. However, before processing the two types of descriptions are compiled into the same format. Whenever a new syntactic constituent is found in the input, the parser immediately checks whether any of the semantic rules can be applied. This means that the system searches for semantic interpretations as early as possible in the parse process without waiting for the syntactic analysis to finish.
Error recovery is done on ungrammatical speech recognition results.
6 Conclusion Satisfactory speech recognition results presuppose access to linguistic knowledge during the acoustic processing. A much debated subject concerning speech understanding systems has been how to integrate speech recognition and NLP in order to simultaneously achieve optimum recognition quality and to generate an adequate syntactic analysis. Focus here has been on describing how knowledge of the domain-specific sublanguage has been exploited in the natural language processing in the initial prototype of the system. This is done partly by application of selectional restrictions and domain-specific categories in order to reduce the generality of the structural analysis and partly by delimitation of the space of interpretation in the semantic analysis. Integration af akustisk genkendelse og natursprogsprocessering .