Hung Ngo published the OAK model

This model is published in Springer LNCS Vol. 12466. It’s a knowledge representation model, called an ontology-based knowledge map, which can collect knowledge from different sources, store it, and exploit either directly by stakeholders or as an input to the knowledge discovery process (Data Mining).

https://doi.org/10.1007/978-3-030-63924-2_14