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A Neural Corpus Indexer for Document Retrieval
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Current state-of-the-art document retrieval solutions mainly follow an index-retrieve paradigm, where the index is hard to be directly optimized for the final retrieval target. In this paper, we aim to show that an end-to-end deep neural network unifying training and indexing stages can significantly improve the recall performance of traditional methods. To this end, we propose Neural Corpus Indexer (NCI), a sequence-to-sequence network that generates relevant document identifiers directly for a designated query. To optimize the recall performance of NCI, we invent a prefix-aware weight-adaptive decoder architecture, and leverage tailored techniques including query generation, semantic document identifiers, and consistency-based regularization. Empirical studies demonstrated the superiority of NCI on two commonly used academic benchmarks, achieving +21.4% and +16.8% relative enhancement for Recall@1 on NQ320k dataset and R-Precision on TriviaQA dataset, respectively, compared to the best baseline method.
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Self-citation
Metadata
- Authors
- Wang, Y., Hou, Y., Wang, H., Miao, Z., Wu, S., Chen, Q., Xia, Y., Chi, C., Zhao, G., Liu, Z., Xie, X., Sun, H., Deng, W., Zhang, Q., & Yang, M.
- Venue
- Advances in Neural Information Processing Systems 35
- Published
- 2022
- Pages
- 25600-25614
- ISSN
- 1049-5258 (ISSN-L)
- OpenAlex
- W7133190757
- Cited by
- 69
- References
- 2
- Citations by year
- 2026: 12 · 2025: 17 · 2024: 24 · 2023: 16
- FWCI
- 12.74
- Type
- conference paper
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- neural information processing systems (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Computer Science › Information Systems › Information Retrieval and Search Behavior
- Physical Sciences › Computer Science › Artificial Intelligence › Natural Language Processing Techniques
- Physical Sciences › Computer Science › Artificial Intelligence › Topic Modeling
- Keywords
- document retrieval, neural representations, document indexing, information retrieval
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