Multi-Tape Two-Level Morphology: A Case Study in Semitic Non-linear Morphology

This paper presents an implemented multi-tape two-level model capable of describing Semitic non-linear morphology. The computational framework behind the current work is motivated by [Kay 1987]; the formalism presented here is an extension to the formalism reported by [Pulman and Hepple 1993]. The objectives of the current work are: to stay as close as possible, in spirit, to standard two-level morphology, to stay close to the linguistic description of Semitic stems, and to present a model which can he used with case by the Semitist. The paper illustrates that if finite-state transducers (FSTs) in a standard two-level morphology model are replaced with multi-tape auxiliary versions (AFSTs), one can account for Semitic root-and-pattern morphology using high level notation.