This book is a collection of papers written by outstandingresearchers in the newly emerging field of computational semantics.Computational semantics is concerned with the computation of themeanings of linguistic objects such as text fragments, spoken dialogueutterances, and e-mail messages. The meaning of such an object isdetermined partly by linguistic information and partly by informationfrom the context in which the object occurs. The information fromthese sources is combined by processes that infer which interpretationof the object applies in the given context. This applies not only tonotoriously difficult aspects of interpreting linguistic objects, suchas indexicals, anaphora, and metonymy, but also to establishing theprecise reference of common nouns and the scopes of noun phrases. Thecentral issue in computational semantics is how processes of findingand combining the relevant linguistic and contextual information intocontextually appropriate meanings can be organised. Traditional approaches of applying context information todisambiguated natural language expressions do not work well, due tothe massive ambiguity in natural language. Recent work incomputational semantics suggests, alternatively, to representlinguistic semantic information in formal structures withunderspecification, and to apply context information in inferenceprocesses that result in further specification of theserepresentations. Underspecified representation and inference aretherefore the key topics in this book. The book is aimed at those linguists, computer scientists, andlogicians who take an interest in the computation of meaning, and whowant to know what is happening in this exciting field of research.