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# Extraction

Eduction extracts entities from documents based on the rules you have created in your dictionaries and grammars. Eduction can output files in multiple formats using `edktool`.

For each nominated field in a document, Eduction identifies each instance of the requested entity. Eduction returns an XML list of matches, or adds the matches to the source document as new fields. Eduction can also identify components of an entity match, such as:

- the parts of a social security number or phone number.
- a confidence score for the accuracy of the match.

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