Ontopia is highly integratable, and has been integrated with a number of content management systems in order to provide these with the full power of Topic Maps for organizing and navigating content. The general approach taken is that authors write content in the CMS user interface, then tag it with topics from the topic map while still in the familiar CMS user interface. The interface for tagging content is taken from the Ontopoly editor, and thus automatically reflects the ontology of the topic map.
We are working on integrating with more CMSs, and results will be announced here as they appear. It is also possible for third parties to develop their own integrations.