What is Knowledge Graph?
TL;DR
A knowledge base that represents relationships between entities in a graph structure. Used for AI knowledge representation and reasoning.
Knowledge Graph: Definition & Explanation
A Knowledge Graph is a knowledge base that represents real-world entities and their relationships in a graph structure. Data is stored as triples (subject-predicate-object), such as 'Tokyo is the capital of Japan.' Knowledge graphs became widely known when Google introduced them into its search engine in 2012. When combined with RAG, GraphRAG — which leverages knowledge graphs for structured retrieval — has gained significant attention for dramatically improving LLM answer accuracy and providing clear evidence for responses. Knowledge graphs are also widely used for complex relationship reasoning, fact-checking, recommendations, and enterprise knowledge management.