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99 lines
2.8 KiB
Plaintext
<!--Copyright 2020 The HuggingFace Team. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
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an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
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# DPR
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## Overview
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Dense Passage Retrieval (DPR) is a set of tools and models for state-of-the-art open-domain Q&A research. It was
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introduced in [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) by
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Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, Wen-tau Yih.
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The abstract from the paper is the following:
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*Open-domain question answering relies on efficient passage retrieval to select candidate contexts, where traditional
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sparse vector space models, such as TF-IDF or BM25, are the de facto method. In this work, we show that retrieval can
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be practically implemented using dense representations alone, where embeddings are learned from a small number of
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questions and passages by a simple dual-encoder framework. When evaluated on a wide range of open-domain QA datasets,
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our dense retriever outperforms a strong Lucene-BM25 system largely by 9%-19% absolute in terms of top-20 passage
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retrieval accuracy, and helps our end-to-end QA system establish new state-of-the-art on multiple open-domain QA
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benchmarks.*
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This model was contributed by [lhoestq](https://huggingface.co/lhoestq). The original code can be found [here](https://github.com/facebookresearch/DPR).
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## DPRConfig
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[[autodoc]] DPRConfig
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## DPRContextEncoderTokenizer
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[[autodoc]] DPRContextEncoderTokenizer
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## DPRContextEncoderTokenizerFast
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[[autodoc]] DPRContextEncoderTokenizerFast
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## DPRQuestionEncoderTokenizer
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[[autodoc]] DPRQuestionEncoderTokenizer
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## DPRQuestionEncoderTokenizerFast
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[[autodoc]] DPRQuestionEncoderTokenizerFast
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## DPRReaderTokenizer
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[[autodoc]] DPRReaderTokenizer
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## DPRReaderTokenizerFast
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[[autodoc]] DPRReaderTokenizerFast
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## DPR specific outputs
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[[autodoc]] models.dpr.modeling_dpr.DPRContextEncoderOutput
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[[autodoc]] models.dpr.modeling_dpr.DPRQuestionEncoderOutput
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[[autodoc]] models.dpr.modeling_dpr.DPRReaderOutput
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## DPRContextEncoder
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[[autodoc]] DPRContextEncoder
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- forward
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## DPRQuestionEncoder
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[[autodoc]] DPRQuestionEncoder
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- forward
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## DPRReader
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[[autodoc]] DPRReader
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- forward
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## TFDPRContextEncoder
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[[autodoc]] TFDPRContextEncoder
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- call
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## TFDPRQuestionEncoder
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[[autodoc]] TFDPRQuestionEncoder
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- call
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## TFDPRReader
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[[autodoc]] TFDPRReader
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- call
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