Patent Document ID: 7904808
Application ID: 11897147

Base Claim:
1. A non-transitory computer-readable recording medium on which a document management program for managing a correction history of a document is recorded, the program making a computer function as: a document store section for storing the document; a correction history table store section for storing a correction history table; a document input section for accepting input of the document which is original and for storing the document inputted in the document store section; a document correction section for correcting a character string of the document stored in the document store section in response to operation input, for registering a correction history including a number of characters deleted by a character string deletion process and a correction history including a number of characters before replacement by a replacement process in the correction history table, and for storing the corrected document in the document store section; and a correction history analysis section for referring to the correction history table to make a decision table including an opacity rate, the opacity rate obtained by dividing a total of the number of the characters deleted by the character string deletion process and the number of the characters before the replacement by the replacement process by a number of characters included in the original document.

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Claim 3:
3. The non-transitory computer-readable recording medium according to claim 1 , wherein if a correction is made in the document more than one time, the correction history analysis section divides a total of a number of characters deleted from a plurality of documents to be corrected by a deletion process and a number of characters replaced in the plurality of documents to be corrected by a replacement process by a total of a number of characters included in the plurality of documents to be corrected, and uses a division result as the opacity rate of the information indicated in the document.