Data and statistics that are produced as part of a Systematic Literature Review (SLR) entitled "Ontologies in Digital Twins: A Systematic Literature Review". The SLR will be submitted to Future Generation Computer System journal's Special Issue on Digital Twin for Future Networks and Emerging IoT Applications. It consists of a set of excel sheets that includes a list of reviewed articles and their analysis. A description of what each sheet contains is given below: Sheet Name Description Search Statistics List of research databases, search tools, search queries and number of gathered results. Unfiltered Paper List List of papers that are initially collected as a result of the paper identification phase. Removed Duplicates List of papers after removing duplicates Marked Non-relevants (Round 1) Marking papers as relevant or non-relevant based on titles, abstracts and skimming Marked Non-relevants (Round 2) Identification of relevant papers by exhaustive reading Final Table Final list of table with analysis results Statistics Statistics based on the analysis results Acknowledgement: This work has received support from The Dutch Research Council (NWO), in the scope of Digital Twin for Evolutionary Changes in water networks (DiTEC) project, file number 19454.