Sparse Retrieval
Sparse retrieval scores documents with high-dimensional sparse signals — typically term frequencies (BM25/TF-IDF). It is strong on exact keywords, IDs, and rare strings.
Hybrid RAG systems often fuse sparse + dense rankings.
Sparse retrieval scores documents with high-dimensional sparse signals — typically term frequencies (BM25/TF-IDF). It is strong on exact keywords, IDs, and rare strings.
Hybrid RAG systems often fuse sparse + dense rankings.