BlueMouse.ai Insights https://www.bluemouse.ai/insights Practical articles on building RAG, OCR and document AI systems. en-gb Why legal RAG needs hybrid search: reciprocal rank fusion, explained with lawyers' queries https://www.bluemouse.ai/insights/legal-rag-hybrid-search-rrf https://www.bluemouse.ai/insights/legal-rag-hybrid-search-rrf Mon, 14 Sep 2026 09:00:00 +0000 Legal RAG Lawyers mix exact citations with plain-language questions. Why legal RAG needs hybrid retrieval, how reciprocal rank fusion merges results, and how to test it. Invoice OCR is the easy part. Validation is what lets finance trust the result. https://www.bluemouse.ai/insights/invoice-ocr-validation-before-automation https://www.bluemouse.ai/insights/invoice-ocr-validation-before-automation Thu, 17 Sep 2026 09:00:00 +0000 OCR and document processing Reading an invoice is the easy part of invoice OCR. A worked example shows the checks that turn extracted fields into data finance can post, and what happens when one fails.