TM4J is a free topic map engine providing
interfaces for the creation, manipulation, import and export of XML topic
maps.
Features include:
- An object model which supports all of the constructs of the XTM 1.0
specification
- An extensible command-line utility for determing various statistics for
a topic map.
- A command-line utility for merging two or more topic maps
automatically.
- An experimental topic map navigation interface using a visualisation
from TheBrain.
- An experimental persistent storage back-end which enables processed
topic maps to be kept in an Ozone Object-oriented database.
TM4J is open source, hosted
at SourceForge, and available under an Apache-style license.