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How is WordPiece tokenization helpful to effectively deal with rare words problem in NLP?



2019 Community Moderator ElectionHow word2vec can handle unseen / new words to bypass this for new classifications?How can I get a measure of the semantic similarity of words?How to use NLP to determine the normal words in the textOrganization of layers in Keras for a NLP problemHow do NLP tokenizers handle hashtags?how to deal with varying output layerNLP algorithms for categorizing a list of words with specific topicsNLP: What are some popular packages for phrase tokenization?Help in NLP ProblemTraining NLP with multiple text input features










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$begingroup$


I have seen that NLP models such as BERT utilize WordPiece for tokenization. In WordPiece, we split the tokens like playing to play and ##ing. It is mentioned that it covers a wider spectrum of Out-Of-Vocabulary (OOV) words. Can someone please help me explain how WordPiece tokenization is actually done, and how it handles effectively helps to rare/OOV words?










share|improve this question









$endgroup$











  • $begingroup$
    This question has been answered here. I'm copying the answer here as well. WordPiece and BPE are two similar and commonly used techniques to segment words into subword-level in NLP tasks. In both cases, the vocabulary is initialized with all the individual characters in the language, and then the most frequent/likely combinations of the symbols in the vocabulary are iteratively added to the vocabulary. Consider the WordPiece algorithm from the [original paper](static.googleusercontent.com/media/research.google.com/en//pubs/…
    $endgroup$
    – Harman
    Apr 2 at 12:35















2












$begingroup$


I have seen that NLP models such as BERT utilize WordPiece for tokenization. In WordPiece, we split the tokens like playing to play and ##ing. It is mentioned that it covers a wider spectrum of Out-Of-Vocabulary (OOV) words. Can someone please help me explain how WordPiece tokenization is actually done, and how it handles effectively helps to rare/OOV words?










share|improve this question









$endgroup$











  • $begingroup$
    This question has been answered here. I'm copying the answer here as well. WordPiece and BPE are two similar and commonly used techniques to segment words into subword-level in NLP tasks. In both cases, the vocabulary is initialized with all the individual characters in the language, and then the most frequent/likely combinations of the symbols in the vocabulary are iteratively added to the vocabulary. Consider the WordPiece algorithm from the [original paper](static.googleusercontent.com/media/research.google.com/en//pubs/…
    $endgroup$
    – Harman
    Apr 2 at 12:35













2












2








2





$begingroup$


I have seen that NLP models such as BERT utilize WordPiece for tokenization. In WordPiece, we split the tokens like playing to play and ##ing. It is mentioned that it covers a wider spectrum of Out-Of-Vocabulary (OOV) words. Can someone please help me explain how WordPiece tokenization is actually done, and how it handles effectively helps to rare/OOV words?










share|improve this question









$endgroup$




I have seen that NLP models such as BERT utilize WordPiece for tokenization. In WordPiece, we split the tokens like playing to play and ##ing. It is mentioned that it covers a wider spectrum of Out-Of-Vocabulary (OOV) words. Can someone please help me explain how WordPiece tokenization is actually done, and how it handles effectively helps to rare/OOV words?







nlp word-embeddings bert






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Mar 27 at 16:54









HarmanHarman

333212




333212











  • $begingroup$
    This question has been answered here. I'm copying the answer here as well. WordPiece and BPE are two similar and commonly used techniques to segment words into subword-level in NLP tasks. In both cases, the vocabulary is initialized with all the individual characters in the language, and then the most frequent/likely combinations of the symbols in the vocabulary are iteratively added to the vocabulary. Consider the WordPiece algorithm from the [original paper](static.googleusercontent.com/media/research.google.com/en//pubs/…
    $endgroup$
    – Harman
    Apr 2 at 12:35
















  • $begingroup$
    This question has been answered here. I'm copying the answer here as well. WordPiece and BPE are two similar and commonly used techniques to segment words into subword-level in NLP tasks. In both cases, the vocabulary is initialized with all the individual characters in the language, and then the most frequent/likely combinations of the symbols in the vocabulary are iteratively added to the vocabulary. Consider the WordPiece algorithm from the [original paper](static.googleusercontent.com/media/research.google.com/en//pubs/…
    $endgroup$
    – Harman
    Apr 2 at 12:35















$begingroup$
This question has been answered here. I'm copying the answer here as well. WordPiece and BPE are two similar and commonly used techniques to segment words into subword-level in NLP tasks. In both cases, the vocabulary is initialized with all the individual characters in the language, and then the most frequent/likely combinations of the symbols in the vocabulary are iteratively added to the vocabulary. Consider the WordPiece algorithm from the [original paper](static.googleusercontent.com/media/research.google.com/en//pubs/…
$endgroup$
– Harman
Apr 2 at 12:35




$begingroup$
This question has been answered here. I'm copying the answer here as well. WordPiece and BPE are two similar and commonly used techniques to segment words into subword-level in NLP tasks. In both cases, the vocabulary is initialized with all the individual characters in the language, and then the most frequent/likely combinations of the symbols in the vocabulary are iteratively added to the vocabulary. Consider the WordPiece algorithm from the [original paper](static.googleusercontent.com/media/research.google.com/en//pubs/…
$endgroup$
– Harman
Apr 2 at 12:35










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