A Multidimensional Model and Query Operations for Contextualized Knowledge Graphs
The following article presents the KG-OLAP framework:
Christoph Schuetz, Loris Bozzato, Bernd Neumayr, Michael Schrefl, and Luciano Serafini
Semantic Web 12(4): 649-683 (2021)
An online Appendix to that article gives additional information regarding formalization and implementation of the KG-OLAP framework.