Sparknlp

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New Features
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- Add getClasses() function to NerDLModel
- Add getClasses() function to ClassifierDLModel
- Add getClasses() function to SentimentDLModel

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Enhancements
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- Improve max sequence length calculation in BertEmbeddings and XlnetEmbeddings

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Bugfixes
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- Fix a bug in RegexTokenizer in Python
- Fix StopWordsCleaner exception in Python when pretrained() is used
- Fix max sequence length issue in AlbertEmbeddings and SentencePiece generation
- Fix HDFS support for setGaphFolder param in NerDLApproach

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New Features
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* Add support for Apache Spark 2.3.x including new Maven artifacts and full support of all pre-trained models/pipelines
* Add 43 new pre-trained models in 43 languages to StopWordsCleaner annotator
* Introduce a new RegexTokenizer to split text by regex pattern

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Enhancements
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* Retrained 6 new BioBERT and ClinicalBERT models
* Add a new param to `start()` function to start the session for Apache Spark 2.3.x

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Bugfixes
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* Add missing library for SentencePiece used by AlbertEmbeddings and XlnetEmbeddings on Windows
* Fix ModuleNotFoundError in LanguageDetectorDL pipelines in Python


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New Features
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* TextMatcher now can construct the chunks from tokens instead of the original documents via buildFromTokens param
* CoNLLGenerator now is accessible in Python


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Bugfixes
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* Fix a bug in ContextSpellChecker resulting in IllegalArgumentException

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Enhancements
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* Improve RocksDB connection to support different storage capabilities
* Improve parameters naming convention in ContextSpellChecker

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Enhancements
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* Add NerConverter to documentation
* Fix multi-language tabs in documentation


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New Features
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* Introducing a new LanguageDetectorDL state-of-the-art annotator to detect and identify languages in documents and sentences
* Add a new param entityValue to TextMatcher to add custom value inside metadata. Useful in post-processing when there are multiple TextMatcher annotators with multiple dictionaries https://github.com/JohnSnowLabs/spark-nlp/issues/920

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Bugfixes
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* Add missing TensorFlow graphs to train ContextSpellChecker annotator https://github.com/JohnSnowLabs/spark-nlp/issues/912
* Fix misspelled param in classThreshold param in ContextSpellChecker annotator https://github.com/JohnSnowLabs/spark-nlp/issues/911
* Fix a bug where setGraphFolder in NerDLApproach annotator couldn't find a graph on Databricks (DBFS) https://github.com/JohnSnowLabs/spark-nlp/issues/739
* Fix a bug in NerDLApproach when includeConfidence was set to true https://github.com/JohnSnowLabs/spark-nlp/issues/917
* Fix a bug in BertEmbeddings https://github.com/JohnSnowLabs/spark-nlp/issues/906 https://github.com/JohnSnowLabs/spark-nlp/issues/918

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Enhancements
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* Improve TF backend in ContextSpellChecker annotator


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New Features
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* Add Python support for PubTator reader to convert automatic annotations of the biomedical datasets into DataFrame
* Add 6 new pre-trained BERT models from BioBERT and ClinicalBERT

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Enhancements
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* Add unit tests for XlnetEmbeddings
* Add unit tests for AlbertEmbeddings
* Add unit tests for ContextSpellChecker


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New Features
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* A new AlbertEmbeddings annotator with 4 available pre-trained models
* A new XlnetEmbeddings annotator with 2 available pre-trained models
* A new ContextSpellChecker annotator, the state-of-the-art annotator for spell checking
* A new SentimentDL annotator for multi-class sentiment analysis. This annotator comes with 2 available pre-trained models trained on IMDB and Twitter datasets
* Add new PubTator reader to convert automatic annotations of the biomedical datasets into DataFrame
* Introducing a new outputLogsPath param for NerDLApproach, ClassifierDLApproach and SentimentDLApproach annotators
* Refactored CoNLLGenerator to actually use NER labels from the DataFrame
* Unified params in NerDLModel in both Scala and Python
* Extend and complete Scaladoc APIs for all the annotators

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Bugfixes
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* Fix position of tokens in Normalizer
* Fix Lemmatizer exception on a bad input
* Fix annotator logs failing on object storage file systems like DBFS

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Documentation
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* Update documentation for release of Spark NLP 2.5.x
* Update the entire [spark-nlp-workshop](https://github.com/JohnSnowLabs/spark-nlp-models) notebooks for Spark NLP 2.5.x
* Update the entire [spark-nlp-models](https://github.com/JohnSnowLabs/spark-nlp-workshop) repository with new pre-trained models and pipelines

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