GroupDocs.Classification for .NET is a document and text classification API for C#, ASP.NET, VB.NET, J# or any other .NET based application. Developers can work with four different types of taxonomies to perform advanced classification, either by using IAB-2 for assigning standardized text categories to text, document taxonomy developed by Aspose for different document types or Sentiment (and Sentiment3) for sentiment analysis. The library analyses text, sentences, even words and supports classifying a variety of industry standard document formats including PDF, Microsoft Word, OpenDocument, RTF and text. Sentiment analysis (classification) supports English, Chinese, Spanish, and German languages with language auto-detection. GroupDocs.Classification for .NET uses its own document processing engine and does not require any external tools be installed on the system.