# Classification

Classification is the act of marking a document according to predefined criteria. When a document is marked as a match for one or more criteria, it can then be tagged, filtered, or routed.

- Categorization. Assign your documents to categories that define topics.

- Taxonomy. Create a hierarchy of categories.

- Eduction. Find useful entities in document text and add it to a tag that you can easily search for, or filter by.

- Sentiment Analysis. Automatically classify documents according to whether it represents positive or negative sentiment.

- Automatic Language Detection. Classify documents according to both their language and character encoding.

- Feature Classification. Identify the main features in an image.

- Audio Classification. Classify audio segments as music, noise, or speech.

- Source Code Detection. Determine whether a document is the source file of a programming language.

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