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Release 3.4.2

Carrot2 Project......
Carrot2: open source framework for building search clustering engines
The 3.4.2 release introduces a simple API for building attribute maps and fixes an occasional ArrayIndexOutOfBoundsException.
Attribute map builders As of version 3.4.2, Carrot2 API makes it possible to build attribute maps in a type-safe fashion. Please see the example code for details.
Fix for an occasional ArrayIndexOutOfBoundsException

When versions 3.4.1, 3.4.0 or 3.3.0 of Carrot2 algorithms are used within a pooling controller (ControllerFactory#createPooling()), an ArrayIndexOutOfBoundsException may occasionally be thrown during initialization or processing. All Carrot2 APIs and tools in version 3.4.1, 3.4.0 and 3.3.0 are affected by this issue. Version 3.4.2 is free from the defect.

For a complete list of improvements and bug fixes, see JIRA issues fixed in version 3.4.2. For more new features, please see release 3.4.0 and release 3.3.0 notes.