Hierarchical lexicon structures are not only of great importance for the nonredundant representation of lexical information, they may also contribute to the efficiency of the actual processing of natural language. Two parsing techniques that render the parsing process efficient are presented. Windowing is a technique for incrementally accessing the hierarchical lexicon. Lexical preferencing imp...

Approaches to morphology typically account for regular, completely productive aaxation, while ignoring sub-regular and semi-productive schemata. I present an alternative approach to derivational morphology which relates exceptions and sub-regularities to the productive rules, and also captures some linguistically relevant generalizations that cannot be expressed in other theories. The data come...

We present a scheme for efficiently representing a lexicaiized tree-adjoining grammar (LTAG). The propcoed representational scheme allows for structure-sharing between lexical entries and the trees associated with the lexical items. A compact organization is achieved by organizing the lexicon in a hierarchical fashion and using inheritance as well as by using lexical and syntactic rules. While ...

This paper discusses a fairly new approach to multilingual lexical representation which abstracts away from the traditional MT architecture to multilingual lexicons. Rather than linking the monolingual lexicons at the level of semantics only, we aim to construct a multilingual lexicon in which information can be shared at all levels of linguistic description using an inheritance-based formalism...

In this paper a morphological component with a limited capability to automatically interpret (and generate) derived words is presented. The system combines an extended two-level morphology [Trost, 1991a; Trost, 1991b] with a feature-based word grammar building on a hierarchical lexicon. Polymorphemic stems not explicitly stored in the lexicon are given a compositional interpretation. Tha t way ...

Many lexical semantic relations, such as the hyponymy relation, can be extracted from text as they occur in detectable syntactic constructions. This paper shows how a hypernym-hyponym based lexicon for Swedish can be created directly from a news paper corpus. An algorithm is presented for building partial hierarchical structures from non domain-specific texts.

Verbs can only be used with a few specific arrangements of their arguments (syntactic frames). Most theorists note that verbs can be organized into a hierarchy of verb classes based on the frames they admit. Here we show that such a hierarchy is objectively well-supported by the patterns of verbs and frames in English, since a systematic hierarchical clustering algorithm converges on the same s...

Semantic network approaches view organization or representation of internal lexicon in the form of either spreading or hierarchical system identified, respectively, as Spreading Activation Model (SAM) and Hi- erarchical Network Model (HNM). However, the validity of either model is amongst the intact issues in the literature which can be studied through basing the instruction compatible wi...