The AGFL system is a collection of software systems for Natural Language Processing, based on the AGFL formalism [#!Article:91:Koster:AffixGrNatLang!#]. The AGFL formalism has been developed by the Computing Science Institute at the University of Nijmegen. It is a formalism in which natural languages can be described by means of two-level grammars: a context free grammar is augmented with a feature level for expressing agreement between syntactic categories. The formalism is suited for specifying both morphological and syntactic analysis. Grammar rules can be extended with transduction parts, which specify the output. The default ouput consists of parse trees. Furthermore, mechanisms are provided to handle open classes of words, which enables the construction of robust parsers.
This document describes the AGFL system. It serves as a user manual to the AGFL formalism, the compiler and the generated parsers. Other papers concerning AGFL are available at the AGFL website at http://www.cs.kun.nl/agfl/.