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# Enum DataExtractionModule.DataExtractionEngine

Data Extraction Engines

###### Namespace: pdftron.PDF

###### Assembly: PDFNet.dll

##### Syntax

    public enum DataExtractionModule.DataExtractionEngine

### Fields

Name | Description
--- | ---
e_doc_classification | Document classification engine. This engine uses artificial intelligence to assign predefined categories to document pages based on their content and structure. Note: This engine is experimental and subject to change.
e_doc_structure | Document structure engine. This engine discovers the full logical structure, including headers, footers, paragraphs, list items, table columns, cells, borders, images and graphics.
e_form | Form field extraction engine. This engine uses artificial intelligence and computer vision to detect form fields in documents that do not have any interactive field annotations embedded.
e_form_key_value | Form field with key value extraction engine. This engine uses artificial intelligence and computer vision to detect form fields, including field name and values, in documents that do not have any interactive field annotations embedded.
e_generic_key_value | Generic key value extraction engine. This engine uses artificial intelligence to detect arbitrary pairs of key and value in documents. Note: This engine is experimental and subject to change.
e_tabular | Tabular Data engine. This engine identifies column and row structure and analyzes numeric columns. It is especially suited to documents that are table-based such as spreadsheets.