Release history

1.4.1July 15 2010Some minor bug fixes
1.4July 2 2010New parsing algorithms, new functionality and some other changes and bugfixes
1.3.1November 14 2009Some minor improvements and bug fixes
1.3September 30 2009 Large update
1.2December 10 2008Large update
1.1June 5 2008Large update
1.0.4February 22 2008Some minor improvements and bug fixes
1.0.3January 26 2008Some minor bug fixes
1.0.2January 10 2008Some minor bug fixes
1.0.1November 13 2007Binaries built with JDK1.5, instead of JDK1.6.
1.0.0November 9 2007First release

MaltParser 1.4.1

Fixed a problem inroduced in 1.4 with path separator in Microsoft Windows environment

MaltParser 1.4

Two new parsing algorithms 'planar' and 'twoplanar' written by Carlos Gómez-Rodríguez.
Replaced the libsvm.jar with LIBSVM version 2.91.
Replaced the liblinear.jar with Liblinear version 1.51.
The default options of the liblinear options is changed from '-s_1_-c_1_-e_0.1_-B_1' to '-s_4_-c_0.1'.
The parser model file '.mco' is not unpacked during parsing, instead the parser reads models and other information directly from the file.
New functionality that allows partial dependency trees to be parsed.
New functionality that allows propagation of column values towards the root of the dependency graph when doing a labeled transition.
MaltParserService that makes it easier for third-party applications to call MaltParser.
Seven examples that show how to use MaltParser from other applications.

MaltParser 1.3.1

Improved the performance of the liblinear learner interface.
'_' character does not mean ignore dependency label in the TabReader.
It is now possible to have file names with blanks.
Better error message if a column is an empty string in TabReader.
Corrected the StackProjective.xml feature model file.

MaltParser 1.3

New design of the org.maltparser.parser package
Reimplementation of the four existing parser algorithms (Nivre arc-eager, Nivre arc-standard, Covington projective and Covington non-projective) in the new design.
Three new parsing algorithms: Stack projective, Stack eager and Stack lazy
Removal of malt-0.4 support
Removal of post-processing for Nivre arc-eager and Nivre arc-standard
Fixed a bug in Nivre arc-eager with root handling strict that affects the results
Interface to liblinear
New address functions: ANC, PANC, LDESC, PLDESC, RDESC, PRDESC
New feature functions: Distance, Exists, NumOf, InputArc and InputArcDir
Some minor changes throughout the code.
The changes may require retraining of parser models.

MaltParser 1.2

New functionality: TigerXML reader and writer for parsing phrase structure.
A total reimplementation of the data structure maintaining the dependency graph and the phrase structure graph (syntax graph package)
Transformation between phrase structure and dependency graph relocated to the new syntax graph package.
Moved large part of the code in SingleMalt configuration a level up into concept called flow charts, which makes much easier to use MaltParser within third-part software.
The new syntax graph package and the flow chart package cause changes in must of the classes.
The option --singlemalt-mode is replaced by --config-flowchart.
Some minor changes throughout the code.
The changes may require retraining of parser models, especially parser models trained with Negra format.

MaltParser 1.1

New functionality: prediction strategy, which makes it possible to divide the prediction of the parser action into several predictions.
New functionality: phrase structure parser that recovers both continuous and discontinuous phrases with both phrase labels and grammatical functions by automatically transforming the phrase structure representations into dependency representations with complex arc labels.
A total reimplementation of the feature model system.
New feature types: for example PrefixFeature, MergeFeature and Merge3Feature
Better integration of the pseudo-projective parsing.
Rather large reimplementation of the guide system.
Divided the Single Malt configuration class into several classes and relocated the class to the package org.maltparser.parser.config.
Rather large changes to the IO system and relocation of these classes into the package
New functionality: NEGRA reader and writer for parsing phrase structure.
The plugin and options management implements the singleton design pattern, which loads these classes independently on the MaltConsoleEngine.
Much of the code in MaltConsoleEngine is relocated to other classes, which makes it easier to create other programs based on MaltParser classes.
Some minor changes throughout the code.

MaltParser 1.0.4

The default value of the class separator option has been changed to the tilde character (~) instead of underscore (_), because it is quite common that underscore is present in dependency labels.
Improved the portability of a MaltParser configuration file (.mco) between different platforms.
Pre-compiled regular expression used for splitting strings.
Improved memory usage when training an SVM model with an external LIBSVM trainer.
Improved error handling when invoking the external LIBSVM trainer.
Slightly improved memory usage of the trie symbol table.

MaltParser 1.0.3

Fixed some minor bugs
Added an error message when LIBSVM runs out of memory
Removed the file "using.htm" from the documentation.

MaltParser 1.0.2

A configuration file (.mco) was not unpacked in the working directory.
URL to feature specification file and data format file were not handled correct.

MaltParser 1.0.1

Binaries built with JDK1.5 instead of JDK1.6.
Some minor bug fixes

MaltParser 1.0.0

This is the first release of the Java implementation of MaltParser, so there are no changes.