A Sign-Based Phrase Structure Grammar for Turkish

International Journal on Information and …, 2010

The construction of an HPSG grammar (Headdriven Phrase Structure Grammar) treating Arabic specificities is not an easy task. In fact, several syntactic phenomena must be taken into account. Thus, the main objective of this work is to construct an Arabic HPSG grammar based on a proposed type hierarchy that categorizes Arabic words. In fact, some adaptations were introduced to HPSG, at the level of features and ID schemata. All linguistic resources (e.g., lexicon, type hierarchy, syntactic rules) are specified in the Type Description Language (TDL). The experimentation of the constructed grammar was done using the Linguistic Knowledge Building (LKB) platform containing generation tools. Indeed, the choice of TDL language is justified. It has syntax similar to HPSG representation and it is considered as the principal input to the LKB platform.

2009

Relative phenomenon is considered as a rather delicate linguistic phenomenon and not explored enough by researchers, especially for the Arabic language. In an attempt to deal with this phenomenon, we propose in this paper a study about different forms of relative clauses. This study will be used for the building of a parser that can process relative sentences. This parser is constructed using the HPSG formalism (Head-driven Phrase Structures Grammar), whose fundamental structure is the feature’s one. In fact, an adaptation of HPSG for the Arabic language is made here in order to integrate the features of the Arabic language. The established HPSG grammar is specified in TDL (Type Description Language). This specification is used by the LKB platform (Linguistic Knowledge Building) to generate the already mentioned parser. Keywords—Arabic relative clauses; Unification grammar HPSG; TDL; LKB

Proceedings of the 21st International Conference on Computational Linguistics and the 44th annual meeting of the ACL - ACL '06, 2006

This paper investigates the use of sublexical units as a solution to handling the complex morphology with productive derivational processes, in the development of a lexical functional grammar for Turkish. Such sublexical units make it possible to expose the internal structure of words with multiple derivations to the grammar rules in a uniform manner. This in turn leads to more succinct and manageable rules. Further, the semantics of the derivations can also be systematically reflected in a compositional way by constructing PRED values on the fly. We illustrate how we use sublexical units for handling simple productive derivational morphology and more interesting cases such as causativization, etc., which change verb valency. Our priority is to handle several linguistic phenomena in order to observe the effects of our approach on both the c-structure and the f-structure representation, and grammar writing, leaving the coverage and evaluation issues aside for the moment.

1998

The main problem with natural language analysis is the ambiguity found in various levels of linguistic information. Syntactic analysis with word senses is frequently not enough to resolve all ambiguities found in a sentence. Although natural languages are highly connected to the real world knowledge, most of the parsing architectures do not make use of it effectively. In this paper, a new methodology is proposed for analyzing Turkish sentences which is heavily based on the constraints in the ontology. The methodology also makes use of morphological marks of Turkish which generally denote semantic properties. Analysis aims to find the propositional structure of the input utterance without constructing a deep syntactic tree, instead it utilizes a weak interaction between syntax and semantics. The architecture constructs a specific meaning representation on top of the analyzed propositional structure.

International Journal of Computing & …, 2009

The relative phenomenon is considered as a rather delicate linguistic phenomenon and not explored enough by researchers, especially for the Arabic language. In an attempt to deal with this phenomenon, we propose in this paper a study about different forms of relative clauses. This study will be used for the building of a parser that can process relative sentences. This parser is constructed using the HPSG formalism (Head-driven Phrase Structures Grammar), whose fundamental structure is the feature's one. In fact, an adaptation of HPSG for the Arabic language is made here in order to integrate the features of the arabic language. The established HPSG grammar is specified in TDL (Type Description Language). This specification is used by the LKB platform (Linguistic Knowledge Building) to generate the already mentioned parser.

International Journal of Linguistics, 2013

The Minimalist Program with its economy principle highlights common mechanisms or necessary components of natural languages but overlooks linguistic differences or relatively trivial components in order to set universal grammar. In this study, we compared English and Turkish languages in terms of the Minimalist Program. The aim of the study is to represent Turkish language according to the principles of the Minimalist Program and to discuss how Turkish and English behave with regard to this concept. The study tries to introduce sample Turkish and English sentence and phrase structure analysis comparatively in terms of Minimalist Approach and thus suggesting solutions to Turkish particular differences in the scope of the Minimalist Program.

Researchers working in Natural Language processing (NLP) found many problems, at different levels. The main problem encountered is the treatment of complicated phenomena, essentially the coordination. This phenomenon is very important. In fact, it is very frequent in various corpora and has always been a center of interest in NLP. Unfortunately, the few works working on this structure treated only some coordinated forms using constructed parsers which are generally so heavy. In this context, our work aims to develop a Headdriven Phrase Structure grammar (HPSG) representing all the different forms of Arabic coordination, based on a proposed typology. The constructed grammar was validated with Linguistic Knowledge Building (LKB). This system is designed for grammars specified in Type Description Language (TDL).

This article proposes a semantics of directional expressions in Norwegian and German, regarded as VP modifiers. The analysis uses Minimal Recursion Semantics, as an integrated part of the HPSG Grammar Matrix-backbone. Directional expressions are analyzed as predicating of an individual, the 'mover'. Context dependent directionals like here receive a decomposed analysis. Telicity values reflecting the presence of various types of directional and locative expressions are computed.

Researchers working in Natural Language processing (NLP) found many problems, at different levels. The main problem encountered is the treatment of complicated phenomena, essentially the coordination. This phenomenon is very important. In fact, it is very frequent in various corpora and has always been a center of interest in NLP. Unfortunately, the few works working on this structure treated only some coordinated forms using constructed parsers which are generally so heavy. In this context, our work aims to develop a Head-driven Phrase Structure grammar (HPSG) representing all the different forms of Arabic coordination, based on a proposed typology. The constructed grammar was validated with Linguistic Knowledge Building (LKB). This system is designed for grammars specified in Type Description Language (TDL). The coordination is an important linguistic phenomenon. It joins two or several compounds using conjunctions. However, there exist some cases where the elements composing a co...