With this volume in honour of Don Walker, Linguistica Computazionale con­ tinues the series of special issues dedicated to outstanding personalities who have made a significant contribution to the progress of our discipline and maintained a special collaborative relationship with our Institute in Pisa.

Introduction. Donald Walker: a Remembrance. Section 1: The Task of Natural Language Processing. Natural Language Processing: an Historical Review; K. Sparck Jones. On Getting a Computer to Listen; J. Robinson. Utterance and Objective: Issues in Natural Language Communication; B. Grosz. On the Proper Place of Semantics in Machine Translation; M. King. Developing a Natural Language Interface to Complex Data; G.G. Hendrix, E.D. Sacerdoti. User-Needs Analysis and Design Methodology for an Automated Document Generator; K. Kukich, K. McKeown, J. Shaw, J. Robin, J. Lim, N. Morgan, J. Philips. Section 2: Building Computational Lexicons. Machine-Readable Dictionaries and Computational Linguistics Research; B. Boguraev. Research Toward the Development of a Lexical Knowledge Base for Natural Language Processing; R.A. Amsler. Discovering Relationships Among Word Senses; R.J. Byrd. Machine Readable Dictionary as a Source of Grammatical Information; E. Hajicová, A. Rosen. The ITT Lexical Database: Dream and Reality; S. Pin-Ngern Conlon. Visions of the Digital Library: Views on Using Computational Linguistics and Semantic Nets in Information Retrieval; J.L. Klavans. Anatomy of a Verb Entry: from Linguistic Theory to Lexicographic Practice; B.T. Atkins, J. Kegl, B. Levin. Issues for Lexicon Building; N. Calzolari. Outline of a Model for Lexical Databases; N. Ide, J. le Maitre, J. Véronts. Construction-Based MT Lexicons; L. Levin, S. Nirenburg. Dependency-Based Grammatical Information in the Lexicon; P. Sgall. Semantics in the Brain's Lexicon -- Some Preliminary Remarks on its Epistemology; H. Schnelle. Section 3: The Acquisition and Use of LargeCorpora. The Ecology of Language; D.E. Walker. Representativeness in Corpus Design; D. Biber. The Text EncodingInitiative; C.M. Sperberg-McQueen. Discrimination Decisions for 100,000 Dimensional; W.A. Gale, K.W. Church, D. Yarowsky. Acquisition and Exploitation of Textual Resources for NLP; S. Armstrong-Warwick. The Center for Electronic Texts in the Humanities; S. Hockey. Design Principles for Electronic Textual Resources: Investigating Users and Uses of Scholarly Information; N.J. Belkin. Section 4: Topics, Methods and Formalisms in Syntax, Semantics and Pragmatics. Evaluating English Sentences in a Logical Model; J. Friedman, D.B. Moran, D.S. Warren. Recovering Implicit Information; M.S. Palmer, D.A. Dahl, R.J. Schiffman, L. Hirschman, M. Linebarger, J. Downing. Flexible Generation: Taking the User into Account; C.L. Paris, V.O. Mittal. Two Principles of Parse Preference; J.R. Hobbs, J. Bear. UD, yet Another Unification Device; R. Johnson, M. Rosner. Varieties of Heuristics in Sentence Parsing; M. Nagao. Some Recent Trends in Natural Language Processing; A.K. Joshi. Stone Soup and the French Room; Y. Wilks.

GPSR Compliance The European Union's (EU) General Product Safety Regulation (GPSR) is a set of rules that requires consumer products to be safe and our obligations to ensure this. If you have any concerns about our products you can contact us on ProductSafety@springernature.com. In case Publisher is established outside the EU, the EU authorized representative is: Springer Nature Customer Service Center GmbH Europaplatz 3 69115 Heidelberg, Germany ProductSafety@springernature.com