Recent Work in Hierarchical Document Retrieval & HiKEY
HiKEY, ACL 2026 · presented by Joohyung Yun
Paper readingDSLab NLP seminar · POSTECH · 2026.09.22
A mini-survey of tree-based search for document QA on one Build / Traverse / Pack frame (RAPTOR, TreeRAG, MemWalker, PageIndex, RDR2), then HiKEY in depth: document trees with index cards, two-stage traversal, evidence packing under a reader budget, and its results. HTML deck.