Unverified70% confidenceFactTime unknown
Exa语义搜索引擎的索引层针对结构化知识内容（论文、技术文档、代码库）做了专项优化
1
Sources
70%
Confidence
Long-term
Relevance
6/1/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedThere are three mainstream knowledge retrieval approaches: vector retrieval, knowledge graphs, and full-text indexing (BM25 keyword retrieval).72% similarUnverified在文件数量不过千的个人知识库场景下，结构化Markdown索引比向量数据库检索更稳定、可解释性更强71% similarUnverifiedRAG知识库质量的关键指标包括文本切片策略（Chunk Size与Overlap）、Embedding模型选型、检索Top-K设置以及重排序（Reranking）策略68% similarVerifiedLlamaIndex focuses on data indexing and retrieval, with more granular support for integrating various data sources67% similar
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