This paper https://www.researchgate.net/publication/247152447_Health_Care_Critical_Knowledge_Monitor_System_Model_Health_Care_Critical_Knowledge_Ontology_Component refer to topic model and ontology. In a esay way you can represent an ontology as a topic map. Hope that it is useful for you.

Conference Paper Health Care Critical Knowledge Monitor System Model: Health ...

Thanks Sir Arjun, i will surely try my best to share my findings abt this topic at this forum, n thanks for the Journal and for your kind reply :)

During my research study, i worked on application of concept maps and information visualization to enhance user experience over DSpace by using comparing many tools such as VUI, SpaceTree, etc. A prototype model also build on this.