standardisation frameworks and standards to be resolved. Furthermore, KGs can be applied in integrated search
engines to present a summary of relevant information about search queries and a list of related topics.
KG Reasoning: KGs can be used in reasoning to accurately predict truth or expressions based on existing infor-
mation or facts. New facts and conclusions can be inferred from the existing entities, concepts, and relationships
in a KG; hence, this is one of the dimensions that should be considered in this systematic review.
Knowledge-graph-based explainable AI- A systematic review