#hierarchical-indexing News & Analysis

HiKEY: Hierarchical Multimodal Retrieval for Open-Domain Document Question Answering

Researchers introduce HiKEY, a hierarchical multimodal retrieval framework designed to improve document-based question answering systems by leveraging document structure as a core retrieval signal. The system addresses critical limitations in existing approaches by implementing a coarse-to-fine retrieval strategy and demonstrating significant performance improvements on ODQA benchmarks.