| 摘要 |
According to one embodiment, a device for identifying types of document files includes an extraction unit, an evaluation unit, and a document type identification unit. The extraction unit extracts document feature information indicating distinguishing information for a document included in a document file. The evaluation unit verifies the validity of the document feature information extracted by the extraction unit. The document type identification unit identifies a type of the document file corresponding to the document feature information extracted by the extraction unit if the document feature information is valid.
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