A Lightweight API-Based Approach for Building Flexible Clinical NLP Systems

Table 1

NLP services of common NLP API providers.

NLP API	Available NLP services
IBM Watson NLU	Entity extraction, concept extraction, relation extraction, text classification, language detection, and sentiment analysis
Aylien	Article extraction, entity extraction, concept extraction, summarization, text classification, language detection, semantic labeling, sentiment analysis, hashtag suggestion, image tagging, and microformat extraction
Lexalytics	Sentiment analysis, concept extraction, categorization, named entity extraction, theme extraction, and summarization
Meaning Cloud	Topic extraction, text classification, sentiment analysis, language detection, and linguistic analysis (POS tagging, parsing, and lemmatization)
Alchemy API	Entity extraction, concept tagging, keywords extraction, relation extraction, text classification, language detection, sentiment analysis, microformat extraction, feed detection, and linked data
TextRazor	Entity extraction, disambiguation, linking, keywords extraction, topic tagging, and classification
Developer Cloud	Concept extraction, translation, personality insights, and classification
Open Calais	Entity extraction, relation extraction, and sentiment analysis
Dandelion API	Entity extraction, text classification, language detection, sentiment analysis, and text similarity
Haven OnDemand	Autocomplete, concept extraction, document categorization, entity extraction, language detection, sentiment analysis, and text tokenization