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Here we will present a graphical software tool called Morph Moulder (MoMo) for teaching the formal foundations of a language with a denotation in a domain of relational typed feature structures as used in Head-Driven Phrase Structure Grammar. With MoMo, students learn the properties of totally well-typed, sort resolved relational feature structures, the use of formal languages to describe typed feature structures and the notions of constraint satisfaction and models of grammars written in a formal language. MoMo was realized and conceived within the context of a set of courses in the format of web-based training, that focuses on the concept of typed feature structures in a curriculum in grammar formalisms and parsing. The formal language of MoMo amends the constraint language of TRALE (an implementation platform for HPSG grammars based on ALE) to accommodate the expressive power of HPSG.
This paper provides a treatment of Polish Plural Comitative Constructions in the paradigm of HPSG in the tradition of Pollard and Sag (1994). Plural Comitative Constructions (PCCs) have previously been treated in terms of coordination, complementation and adjunction. The objective of this paper is to show that PCCs are neither instances of typical coordinate structures nor of typical complement or adjunct structures. It thus appears difficult to properly describe them by means of the standard principles of syntax and semantics. The analysis proposed in this paper accounts for the syntactic and semantic properties of PCCs in Polish by assuming an adjunction-based syntactic structure for PCCs, and by treating the indexical information provided by PCCs not as subject to any inheritance or composition, but as a result of applying a set of principles on number, gender and person resolution that also hold for ordinary coordinate structures.
One of the most popular techniques used in HPSG-based studies to describe linguistic phenomena is the raising mechanism. Besides ordinary raising verbs or adjectives, this tool has been applied for handling verbal complexes and discontinuous constituents, among other phenomena. In this paper, a new application for raising within the HPSG paradigm will be discussed, thereby investigating data from the prepositional domain. We will analyze linguistic properties of word combinations in German consisting of a preposition, a noun, and another preposition (such as auf Grund von (‘by virtue of’)), thus arguing that raising is the most appropriate method for satisfactorily describing the crucial syntactic features which are typical for those expressions. The objective of this paper is thus to demonstrate the efficiency of the raising mechanism as used in HPSG, and therefore, to emphasize the importance of designing a satisfactory uniform theory of raising within this grammar framework.
This paper focuses on aspects of the licensing of adverbial noun phrases (AdvNPs) in the HPSG grammar framework. In the first part, empirical issues will be discussed. A number of AdvNPs will be examined with respect to various linguistic phenomena in order to find out to what extent AdvNPs share syntactic and semantic properties with non-adverbial NPs. Based on empirical generalizations, a lexical constraint for licensing both AdvNPs and non-adverbial NPs will be provided. Further on, problems of structural licensing of phrases containing AdvNPs that arise within the standard HPSG framework of Pollard and Sag (1994) will be pointed out, and a possible solution will be proposed. The objective is to provide a constraint-based treatment of NPs which describes non-redundantly both their adverbial and non-adverbial usages. The analysis proposed in this paper applies lexical and phrasal implicational constraints and does not require any radical modifications or extensions of the standard HPSG geometry of Pollard and Sag (1994).
Since adverbial NPs have particularly high frequency and a wide spectrum of uses in inflectional languages such as Polish, we will take Polish data into consideration.
We present data-driven methods for the acquisition of LFG resources from two German treebanks. We discuss problems specific to semi-free word order languages as well as problems arising from the data structures determined by the design of the different treebanks. We compare two ways of encoding semi-free word order, as done in the two German treebanks, and argue that the design of the TiGer treebank is more adequate for the acquisition of LFG resources. Furthermore, we describe an architecture for LFG grammar acquisition for German, based on the two German treebanks, and compare our results with a hand-crafted German LFG grammar.