Beyond Lexical: A Semantic Retrieval Framework for Textual Search EngineDownload PDF

Anonymous

09 Jun 2019 (modified: 28 Jun 2019)OpenReview Anonymous Preprint Blind SubmissionReaders: Everyone
  • Abstract: Search engine has become a fundamental component in various web and mobile applications. Retrieving relevant documents from the massive datasets is challenging for a search engine system, especially when faced with verbose or tail queries. In this paper, we explore a vector space search framework for document retrieval. Specifically, we trained a deep semantic matching model so that each query and document can be encoded as a low dimensional embedding. Our model was trained based on BERT architecture. We deployed a fast k-nearest-neighbor index service for online serving. Both offline and online metrics demonstrate that our method improved retrieval performance and search quality considerably, particularly for tail queries
  • Keywords: search engine, semantic retrieval, BERT
  • TL;DR: A deep semantic framework for textual search engine document retrieval
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