{"type": "article", "title": "Vector Search Fundamentals for RAG Design: ANN (HNSW), Distance Metrics, Metadata Filtering, and BM25", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/vector-search-fundamentals-for-rag-design-ann-hnsw-distance-metrics-metadata-and", "original_source": "https://dev.to/hiroki-kameyama/vector-search-fundamentals-for-rag-design-ann-hnsw-distance-metrics-metadata-filtering-and-34p5", "published": "2026-08-10T20:53:53+00:00", "accessed": "2026-08-10", "id": "vector-search-fundamentals-for-rag-design-ann-hnsw-distance-metrics-metadata-and"}