ztm.topicmaps is a Topic Maps engine that strives to be compliant with ISO 13250-2: Topic Maps — Data Model (TMDM). It is the most important package of ZTM. All other packages are built on top of.
It is written in Python and as the core engine it is targeted at developers. See the larger ZTM Topic Maps framework for user oriented features.
See also
ztm.topicmaps is a topic map engine built on top of Zope 3 libraries.