In the early years of generative grammar it was assumed that the appropriate mechanism for generating syntactic structures was a grammar of context-free rewriting rules. The twelve essays in this volume discuss recent challenges to this classical formulation of phrase structure and the alternative conceptions proposed to replace it. Each article approaches this issue from the perspective of a different linguistic framework, such as categorical grammar, government-binding theory, head-driven phrase structure grammar, and tree-adjoining grammar. By contributing to the understanding of the differing assumptions and research strategies of each theory, this volume serves as an important survey of current thinking on the frontier of theoretical and computation linguistics.

V, ThemelPatients to the lowest specifier of V', and Agents to a position outside the minimal VP. Again, thematic information is encoded in terms of configurational properties. Addressing the issue of phrase structure in another domain, Margaret Speas investigates the status of null pronominal objects in Navajo. Following Rizzi (1986), she assumes that null pronouns must meet both a licensing and an identification condition. More specifically, she demonstrates that distributional restrictions on null pronominal objects in Navajo can be explained if it is assumed that null objects obey the identification condition expressed by the Generalized Control Rule of Huang (1984). Distinguishing three types of null objects, she argues that relevant licensing condition on two subtypes of null objects involves rich agreement. However, it appears that there are languages lacking rich agreement but with pro in object position. Speas accounts for these phenomena by a rule of economy of projection. A second series of papers is concerned with the way in which functional categories derive aspects of sentential interpretation. Three issues in this research program are investigated here: external arguments as arguments of functional projections (Kratzer), the specificity interpretation of clitics (Sportiche), and the interpretation of tense (Stowell). In all three cases, phrase structure is put to use to derive interpretive effects. Angelika Kratzer proposes that external arguments are not part of the verb.

O. PRELIMINARY REMARKS Initial drafts of the papers in this collection were presented in a con ference entitled 'Views on Phrase Structure', held at the University of Florida, Gainesville, in March, 1989. Eleven of the twenty-three partici pants in the conference were able to contribute to this volume. The purpose of the conference was to explore theories of phrase structure in their relation to other subsystems of grammar and/or systems of nonlinguistic knowledge. Some of the grammatical subsystems which the authors consider are theta-theory, movement, Case, and binding; a number of papers address how the conceptual system and/or aspects of language use may interact. Unifying the various approaches and perspectives is an attempt to furnish hypotheses concerning prin ciples of phrase structure with some sort of independent justification. 1. PHRASE STRUCTURE THEORY: A BRIEF HISTORY A basic outline for a theory of phrase structure theory is accepted by all of the authors here; it is known as 'X-bar theory'. The concepts of X-bar theory are expressed in some form by a number of pre-generative linguists. For example, Bloomfield (1933) contrasted endocentric struc tures such as noun phrases and verb phrases with those he considered exocentric, e. g. prepositional phrases and clauses. Jespersen (1933), while presenting a functional system of description (in terms of 'ranks', where rank one is 'nominal', for example), clarified the relations among the head of a phrase, its modifier, and a phrase which modifies the modifier.

This volume provides a comprehensive view of the current issues in contemporary syntactic theory. Written by an international assembly of leading specialists in the field, these 2 original articles serve as a useful reference for various areas of grammar. Contains 23 articles written by an international assembly of specialists in the field. The lucidly written articles grant accessibility to crucial areas of syntactic theory. Contrasting theories are represented. Contains an informative introduction and extensive bibliography which serves as a reference tool for both students and professional linguists.

presupposition fails, we now give a short introduction into Unification Grammar. Since all implementations discussed in this volume use PROLOG (with the exception of BlockjHaugeneder), we felt that it would also be useful to explain the difference between unification in PROLOG and in UG. After the introduction to UG we briefly summarize the main arguments for using linguistic theories in natural language processing. We conclude with a short summary of the contributions to this volume. UNIFICATION GRAMMAR 3 Feature Structures or Complex Categories. Unification Grammar was developed by Martin Kay (Kay 1979). Martin Kay wanted to give a precise defmition (and implementation) of the notion of 'feature'. Linguists use features at nearly all levels of linguistic description. In phonetics, for instance, the phoneme b is usually described with the features 'bilabial', 'voiced' and 'nasal'. In the case of b the first two features get the value +, the third (nasal) gets the value -. Feature value pairs in phonology are normally represented as a matrix. bilabial: + voiced: + I nasal: - [Feature matrix for b.] In syntax features are used, for example, to distinguish different noun classes. The Latin noun 'murus' would be characterized by the following feature-value pairs: gender: masculin, number: singular, case: nominative, pred: murus. Besides a matrix representation one frequently fmds a graph representation for feature value pairs. The edges of the graph are labelled by features. The leaves denote the value of a feature.

This pioneering book lays new foundations for the study of reference and truth. It seeks to explain the origins and characteristics of human ways of relating to the world by means of an understanding of the inherent structures of the mind. Wolfram Hinzen explores truth in the light of Noam Chomsky's Minimalist Program. Truth, he argues, is a function of the human mind and, in particular, likely presupposes the structure of the human clause. Professor Hinzen begins by setting out the essentials of the Minimalist Program and by considering the explanatory role played by the interfaces of the linguistic system with other cognitive systems. He then sets out an internalist reconstruction of meaning. He argues that meaning stems from concepts, originating not from reference but from intentional relations built up in human acts of language in which such concepts figure. How we refer, he suggests, is a function of the concepts we possess, rather than the reverse in which reference to the world gives us the concepts to realize it. He concludes with extended accounts of declarative sentences and names, the two aspects of language which seem most inimical to his approach. The book makes important and radical contributions to theory and debate in linguistics, philosophy, and cognitive science. The author frames his argument in a way that will be readily comprehensible to scholars and advanced students in all three disciplines.

Lexical Functional Grammar (LFG) is a nontransformational theory of linguistic structure, first developed in the 1970s by Joan Bresnan and Ronald M. Kaplan, which assumes that language is best described and modeled by parallel structures representing different facets of linguistic organization and information, related by means of functional correspondences. This volume has five parts. Part I, Overview and Introduction, provides an introduction to core syntactic concepts and representations. Part II, Grammatical Phenomena, reviews LFG work on a range of grammatical phenomena or constructions. Part III, Grammatical modules and interfaces, provides an overview of LFG work on semantics, argument structure, prosody, information structure, and morphology. Part IV, Linguistic disciplines, reviews LFG work in the disciplines of historical linguistics, learnability, psycholinguistics, and second language learning. Part V, Formal and computational issues and applications, provides an overview of computational and formal properties of the theory, implementations, and computational work on parsing, translation, grammar induction, and treebanks. Part VI, Language families and regions, reviews LFG work on languages spoken in particular geographical areas or in particular language families. The final section, Comparing LFG with other linguistic theories, discusses LFG work in relation to other theoretical approaches.