Alternatively, we can try to borrow a new topic ontology from some documentation site available
within KNIME. Indeed, a node description can be found for each selected node in the right panel in
the KNIME workbench. The node description text comes from an XML file available within KNIME.
The node name could be used as the topic class and the description text could be used as the source
text describing that topic class. All those description XML files have been collected, zipped, and used
to build the topic ontology for the forum topic detection.