Knowledge Graph Retrieva

Knowledge Graph Retrieval is the process of querying a graph-structured database to pull entities and their relationships—people, places, products, events—so downstream applications can answer questions with factual precision. A query engine (SPARQL, Cypher, or GraphQL) navigates nodes and edges using semantic filters, graph embeddings, or hybrid keyword-plus-graph search. Results return as triples or subgraphs—e.g., (Tesla, foundedBy, Elon Musk)—which an LLM or API formats into natural language or JSON. Retrieval pipelines often include entity linking to map user text to graph IDs, permission checks for sensitive edges, and ranking by path relevance or PageRank. Metrics like response latency, hit rate, and answer accuracy gauge performance. In Retrieval-Augmented Generation (RAG), Knowledge Graph Retrieval grounds the model in verified facts, reducing hallucinations and enabling explainable citations. Challenges—schema evolution, namespace conflicts, and scale—are mitigated by ontology management, graph sharding, and embedding-based indexing.