summarization

Definition

Compressing a long input into a short faithful output. The classic split is extractive — selecting spans from the source — versus abstractive, which rewrites and is therefore prone to asserting things the source never said. Automatic evaluation is the weak point: n-gram overlap metrics reward surface similarity and are largely blind to whether the summary is factually consistent with its source.

Explainers using this term

• GraphRAG from Scratch — Where Knowledge Graphs Meet RetrievalFrom Local to Global: A Graph RAG Approach to Query-Focused Summarization