IDOL OnDemand by HP offers an array of data processing APIs for format conversion, image analysis, indexing, search, and textual analysis. Preview capabilities exist to view how many of these RESTful APIs behave in action. The Sentiment Analysis API accepts and scans a text file to return either positive, neutral, or negative sentiment. It does this by comparing content with a library of specific words that evoke negative emotion, and by recognizing phrases that are indicative of an emotional bias.
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