Packages
AceJet  
Jet The root Jet package provides the methods for top-level system control and for the Console.
Jet.Concepts The Concepts package provides the classes for organizing and editing a hierarchy of concepts, and associating the concepts with individual words..
Jet.HMM The HMM package includes the classes for Hidden Markov Models, and part-of-speech and name taggers implemented using HMMs.  A separate description is available of the overall structure and external representation of these models, provided for those who wish to modify the models.
Jet.Lex The Lex Package incorporate the code for reading dictionaries, looking words up in dictionaries, and tokenizing text.
Jet.Lisp The Lisp package includes the basic classes for symbol manipulation in Jet: literals, variables, and feature sets.
Jet.Parser The Parser package includes several types of parsers (top-down, bottom-up, and chart).
Jet.Pat The Pat package encapsulates the basic pattern application mechanism of Jet, sets of pattern/action rules which can be  applied to a document to add or modify annotations on the document.  The external form of the pattern language is described below;  the classes used to encode these patterns are summarized separately.
Jet.Refres The Refres package provides the methods for identifying coreference relations within a document.
Jet.Scorer The Scorer package provides the classes for scoring an annotated document against an answer key..
Jet.Tipster The Tipster package provides the basic methods for recording information about documents.  It is loosely based on the 'Tipster Architecture' developed by R.Grishman as part of the Government-sponsored Tipster program.  The basic objects are Documents and Annotations;  a Document is a container for the text of the document, and a set of Annotations on the Document.
Jet.Zoner The Zoner package contains methods for identifying text segments (sentences, etc.) within the document.