JP2018028714A - Information processing apparatus and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a storage area for a document by taking a content included in the document as a storage unit.SOLUTION: An information processing apparatus comprises: a content extraction part 13 that extracts a content included in an image of a document to be stored according to a content extraction rule in which, of contents included in the document, a content enabling tracking of the document is defined; a content registration part 153 that registers the extracted content in a content storage part 25; and a document information registration part 155 that registers a content ID of the content extracted from the document in a document information storage part 26 in association with the name of the document to register the document as a combination with the content.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an information processing apparatus and a program.

  In an image log system that stores and manages document data as image files in a hard disk device, when a file stored in the hard disk device is output, the user ID of the user who output the file is recorded as file attribute information. File management may be performed. If this system is used, it is possible to easily identify the output person of the file containing the information leaked when the information leak is detected, so that the information leak can be traced.

  By the way, if the entire image file to be managed is stored in the hard disk device as it is, the storage capacity of the hard disk device may be compressed over time. Therefore, conventionally, a technique has been proposed in which the character string portion of document data is subjected to OCR to reduce the image data amount of the character string portion (for example, Patent Document 1).

JP 2007-086956 A JP 2009-110319 A

  However, in the past, even if the amount of data in the character string portion of the file can be reduced, the entire file is targeted for storage without removing the image data of the portion unnecessary for tracking information leakage from the storage target. .

  An object of the present invention is to reduce the storage area of a document by using content contained in the document as a storage unit.

  The information processing apparatus according to the present invention is received by the document receiving unit based on a document receiving unit that receives a document to be stored and content extraction definition information that defines content to be stored among the contents included in the document. Extraction means for extracting content from the extracted document, content registration means for registering the content extracted by the extraction means in the content storage means, and document identification information for identifying the document received by the document reception means. Document information registration means for generating document information by associating the content identification information of the content extracted from the content storage means and stored in the content storage means and registering the document information in the document information storage means.

  When the same content as the content extracted by the extracting unit is already registered in the content storing unit, the content registering unit does not register the content extracted by the extracting unit in the content storing unit. The document information registration means generates document information by associating the content identification information of the same content with the document identification information.

  The content registering unit may include a content similar to the content extracted by the extracting unit in the document identification information when content similar to the content extracted by the extracting unit is registered in the content storage unit. The difference information is registered in the content storage unit as content, and the document information registration unit generates the document information by associating the content identification information of the difference information with the document identification information.

  Further, the present invention is characterized by further comprising a restoring means for restoring the content with reference to content management information in which the similar content is associated with the difference information extracted by the extracting means.

  A content output unit that outputs content registered in the content storage unit; a content reception unit that receives content selected from the content output by the output unit; and the content reception unit And document information output means for outputting information relating to the document including the content.

  The content extraction definition information defines a content that enables document tracking, and the content receiving means receives content included in a leaked document.

  And an attribute information receiving unit configured to receive attribute information of the document including an output person of the document to be stored, wherein the document information registration unit associates the attribute information of the document with the document identification information, and The information output means outputs attribute information of the document as information relating to the document.

  In addition, when content is classified into categories and registered in the content storage unit, the content registration unit includes a category determination unit that determines a category as a classification destination of the content extracted by the extraction unit, The content extracted by the extraction unit is classified into the category received by the category determination unit and registered in the content storage unit, and the content output unit is configured to specify a category when outputting information about the document. The designated category and the content classified into a category including the category in a lower layer are extracted from the content storage means and displayed.

  The program according to the present invention is received by the document receiving means based on the document receiving means for receiving the document to be stored, and the content extraction definition information in which the content to be stored among the contents included in the document is defined. Extraction means for extracting content from the extracted document, content registration means for registering the content extracted by the extraction means in the content storage means, and document identification information for identifying the document received by the document reception means. The content information stored in the content storage means is associated with the content identification information to generate document information and register it in the document information storage means.

  According to the first aspect of the present invention, the storage area of the document can be reduced by using the content included in the document as a storage unit.

  According to the second aspect of the present invention, when the same content as the content to be stored is already registered, it is not necessary to store the same content repeatedly.

  According to the third aspect of the present invention, when content similar to the content to be stored is registered, only the difference from the similar content can be extracted and stored as the content to be stored. .

  According to the fourth aspect of the present invention, it is possible to restore the content storing only the difference.

  According to the fifth aspect of the present invention, it is possible to output information relating to a document including stored content.

  According to the sixth aspect of the present invention, it is possible to output information relating to a document to be tracked.

  According to the invention described in claim 7, it is possible to specify the output person of the document to be tracked.

  According to the invention described in claim 8, it is possible to facilitate the narrowing down of the content included in the document to be tracked.

  According to the ninth aspect of the present invention, the storage area of the document can be reduced by using the content included in the document as a storage unit.

1 is a block configuration diagram showing a document management apparatus which is an embodiment of an information processing apparatus according to the present invention, and shows a configuration related to document registration. FIG. 1 is a block configuration diagram showing a document management apparatus which is an embodiment of an information processing apparatus according to the present invention, and shows a configuration related to document search. FIG. It is a hardware block diagram of the document management apparatus in this Embodiment. It is the flowchart which showed the registration process of the document in this Embodiment. It is a flowchart following FIG. 4A. It is the figure which showed an example of the data structure of the attribute information of the said document registered in relation with the document stored in this Embodiment. It is the figure which showed an example of the data structure of the content category management information memorize | stored in the content category management information storage part in this Embodiment. It is the figure which represented typically the relationship between a category and a content based on the example of a setting of the content category management information shown in FIG. It is the figure which showed an example of the data structure of the document information registered into the document information storage part in this Embodiment. It is the flowchart which showed the document search process in this Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a document management apparatus 10 which is an embodiment of an information processing apparatus according to the present invention. In particular, FIG. 1 shows a structure related to document registration. FIG. 2 is a block diagram showing the document management apparatus 10 as in FIG. 1, but particularly shows a configuration related to document search. Components not used in the description of the present embodiment are omitted from FIGS. The document management apparatus 10 in this embodiment is an apparatus that stores and manages document data as an image.

  FIG. 3 is a hardware configuration diagram of the document management apparatus 10 according to the present embodiment. The document management apparatus 10 according to the present embodiment can be realized by a general-purpose hardware configuration that has existed in the past. That is, as shown in FIG. 3, the document management apparatus 10 includes a CPU 31, a ROM 32, a RAM 33, a hard disk drive (HDD) 34, a mouse 35 and a keyboard 36 provided as input means, and a display 37 provided as a display device. An input / output controller 38 and a network controller 39 provided as communication means are connected to an internal bus 40, respectively.

  Returning to FIG. 1, the document management apparatus 10 according to the present exemplary embodiment includes a document data reception unit 11, a document attribute information reception unit 12, a content extraction unit 13, a category determination unit 14, a content management unit 15, and a content extraction rule setting unit 16. A category classification rule setting unit 17, a content extraction rule storage unit 22, a category classification rule storage unit 23, a content category management information storage unit 24, a content storage unit 25, and a document information storage unit 26. The document data receiving unit 11 functions as a document receiving unit that receives an image of document data to be stored. Since the document management apparatus 10 is realized by a computer, the document received by the document data receiving unit 11 is electronic data (image). However, for convenience of explanation, the document image is also simply expressed as “document”. explain. The document attribute information receiving unit 12 functions as an attribute information receiving unit that receives attribute information of a document to be stored. The content extraction unit 13 functions as an extraction unit that extracts content from a document received by the document data reception unit 11 based on a content extraction rule as content extraction definition information registered in the content extraction rule storage unit 22. Here, “content” refers to information included in a document, and there are types such as a text part, a table, and an image. The category determination unit 14 functions as a category determination unit that determines a category as a classification destination of each content extracted by the content extraction unit 13 based on the category classification rule registered in the category classification rule storage unit 23. The content extraction rule setting unit 16 sets and registers a content extraction rule in the content extraction rule storage unit 22 based on an input from an administrator, a developer, or the like (hereinafter simply “administrator”). The category classification rule setting unit 17 sets and registers the category classification rule in the category classification rule storage unit 23 based on the administrator's input.

  This embodiment is characterized in that the entire document to be stored is not stored as it is, but the content included in the document is used as a storage unit. Therefore, the content included in the document is stored in the content storage unit 25, but the content management unit 15 manages this content. The content management unit 15 includes a difference calculation unit 151, a difference content generation unit 152, a content registration unit 153, a content category management information registration unit 154, and a document information registration unit 155. The difference calculation unit 151 includes a content to be registered in the content storage unit 25 (hereinafter, “registration target content”) and a classification destination of the content to be registered among the content already registered in the content storage unit 25. And a difference value with each content classified into a category including the category in a lower layer. When the difference content generation unit 152 determines that content similar to the registration target content (hereinafter, “similar content”) is registered in the content storage unit 25 based on the difference value calculated by the difference calculation unit 151, the registration is performed. Difference information between the target content and similar content is extracted. The content registration unit 153 is provided as a content registration unit, and registers content (registration target content) extracted by the content extraction unit 13 in the content storage unit 25. However, if similar content exists, the content of the process differs, for example, the registration target content is not registered as it is. Details of this registration process will be described later. As the content is registered, the content category management information registration unit 154 sets and registers content category management information including content management information related to the content and category management information related to the category in the content category management information storage unit 24. The document information registration unit 155 is provided as document information registration means, and the content identification of the content extracted from the document and stored in the content storage unit 25 is added to the document identification information for identifying the document received by the document data reception unit 11. Document information is generated in association with the information and registered in the document information storage unit 26. Further, the document information registration unit 155 registers the document identification information in the document information storage unit 26 in association with the attribute information of the document received by the document attribute information reception unit 12.

  In FIG. 2, the document management apparatus 10 includes a category receiving unit 18, a content display unit 19, and an information display unit 20. The content category management information storage unit 24, the content storage unit 25, and the document information storage unit 26 have the same configuration as shown in FIG. The category accepting unit 18 accepts a category to which content included in a document to be searched (document in which leakage is detected) input and specified by the administrator belongs. The content display unit 19 is provided as a content output unit, and displays the category received by the category receiving unit 18 among the content stored in the content storage unit 25 and the content classified into the category including the category in the lower layer. 37. The content display unit 19 also functions as a restoration unit. When the content to be displayed is generated from the difference information due to the presence of similar content, the content display unit 19 restores the content with reference to the content category management information. The administrator selects the content included in the document to be searched from the content displayed by the content display unit 19 (the document in which leakage is detected), but the information display unit 20 selects the selected content. It functions as a content accepting unit that accepts content and a document information output unit that outputs information about a document including the content. In the present embodiment, document attribute information is displayed on the display 37 as information relating to the document. The data configuration of each storage unit 22 to 26 will be described later.

  The constituent elements 11 to 20 in the document management apparatus 10 are realized by a cooperative operation of a computer that forms the document management apparatus 10 and a program that operates on the CPU 31 mounted on the computer. In addition, each of the storage units 22 to 26 is realized by the HDD 34 mounted on the document management apparatus 10. Alternatively, all or part of the storage unit may use the RAM 33 or an external storage unit via a network.

  Further, the program used in this embodiment can be provided not only by communication means but also by storing it in a computer-readable recording medium such as a CD-ROM or USB memory. The program provided from the communication means or the recording medium is installed in the computer, and various processes are realized by the CPU of the computer sequentially executing the program.

  Next, an operation in the present embodiment will be described. In order to operate the document management apparatus 10, it is necessary to set a content extraction rule and a category classification rule in advance. Of course, the content extraction rule and the category classification rule may be appropriately added, changed, or deleted after the operation is started.

  In the content extraction rule, a rule for specifying content to be stored among content included in a document is defined. In the case of the present embodiment, a rule for specifying contents that can be traced is defined in order to be able to trace a leaked document. That is, content that is not useful for document tracking is excluded from the storage target in the content storage unit 25. That is, a rule for allocating necessity of content is set as a content extraction rule. In the present embodiment, as described above, the document is divided and stored in units of content, but by not storing content that does not contribute to the achievement of the purpose at the time of storage, the storage area of the content storage unit 25 is stored. A reduction was made. In this embodiment, a content extraction rule is created by a program, and the content extracting unit 13 characterizes content (character string, image, etc. of OCR result) and content attribute information (for example, a drawing number ( It is set so that the string)) can be extracted.

  In the category classification rule, a rule for uniquely determining a category for registering the content extracted by the content extraction unit 13 is defined. For example, if the content attribute information includes the figure number XX and the document attribute information includes the user ΔΔ, the contents are classified into the category □□.

  Next, document registration processing according to the present embodiment will be described with reference to the flowcharts shown in FIGS. 4A and 4B.

  When an application for document registration processing is started in response to a user's predetermined operation, first, the document data receiving unit 11 acquires an image of a document to be registered designated by the user (step 101), and the document The attribute information receiving unit 12 acquires attribute information of the document (step 102). An example of the data structure of the attribute information is shown in FIG. The attribute information is generated by printing out a document that is the basis of the document image received by the document data receiving unit 11 by a job (print job), and the output person is a user whose user ID is “user001”. I understand.

  Subsequently, the content extraction unit 13 executes the content extraction rule program registered in the content extraction rule storage unit 22 and extracts the content included in the document and the attribute information of each content (step 103). As described above, the content extraction unit 13 extracts only the content that enables document tracking according to the definition of the content extraction rule from the registration target document.

  The content extraction unit 13 extracts one or a plurality of contents by the above process, but the document management apparatus 10 repeatedly executes the process described below for each extracted content.

  First, the category determination unit 14 extracts one content that has not yet been processed from the extracted content, and refers to the category classification rule based on the content attribute information acquired by the content extraction unit 13 to select one of the categories. (Step 105). As described above, in this embodiment, contents are classified and registered in categories for convenience of document search. FIG. 7 schematically shows the relationship between the categories and contents.

  When the category as the content classification destination is determined, the content management unit 15 registers the content in the content storage unit 25. For this purpose, the difference calculation unit 151 determines the content (content to be registered) and The difference value between the content registered in the content storage unit 25 and the content included in the ancestor category (hereinafter referred to as “comparison target content”) of the registration target content is calculated ( Step 106). Here, the “ancestor category” refers to a category including a category that is a classification destination of the registration target content in a lower layer. Based on the category relationship shown in FIG. 7, when the category to which the registration target content is classified is “part A”, “root”, “product A”, and “drawing” correspond to the ancestor category.

  By the way, when the difference value between the registration target content and the comparison target content is 0, there is no difference, that is, the same content. Moreover, it can be said that the smaller the difference value, the higher the similarity between the registration target content and the comparison target content. In this embodiment, a threshold value that is a criterion for determining whether or not they are similar is set in advance, and when the difference value is equal to or smaller than the threshold value, it is determined that the registration target content and the comparison target content are similar.

  Here, when the same comparison target content as the registration target content is not registered in the content storage unit 25 (N in Step 107), the comparison target content similar to the registration target content is not registered in the content storage unit 25. In this case (N in Step 108), the content management unit 15 issues new identification information (content ID) for identifying the content to be registered (Step 110). When the comparison target content similar to the registration target content is registered in the content storage unit 25 (Y in step 108), the difference content generation unit 152 extracts the difference information by extracting the difference between the registration target content and the similar content. Generate (step 109).

  The difference information is information indicating a difference between the registration target content and the similar content. The difference includes information on a part to be added to similar content and information on a part excluded from the similar content. In this embodiment, the difference information is managed as content. And the content management part 15 issues content ID with respect to the content which is difference information (step 110).

  On the other hand, when the same comparison target content as the registration target content is already registered in the content storage unit 25 (Y in step 107), the content management unit 15 registers the content ID issued for the same comparison target content It is given to the target content (step 111).

  When the above processing is performed on all the contents extracted from the document to be stored (N in Step 104), the content registration unit 153 registers each content in the content storage unit 25 (Step 112). If there is no identical or similar content, the content may be registered in the content storage unit 25 as it is. If similar content exists, the content based on the difference information is registered. If the same content exists, it is not necessary to register again because the same content has already been registered.

  In the present embodiment, the storage area is reduced by registering only the contents to be stored. Further, when similar content exists, only the difference from the similar content is stored, and when the same content exists, the effect of reducing the storage area is further enhanced by avoiding duplicate registration. .

  Then, the content category management information registration unit 154 registers content category management information indicating the relationship between content, between categories, and between content and category in the content category management information storage unit 24 (step 113).

  FIG. 6 is a diagram showing an example of a data configuration of content category management information stored in the content category management information storage unit 24 in the present embodiment. FIG. 7 is a diagram schematically showing the relationship between categories and contents based on the setting example of FIG.

  As is apparent from FIG. 7, categories are hierarchically formed in the present embodiment. Referring to a record of type “category” in FIG. 6, each category has a category ID as category identification information (ID), a category label (category name), and a category immediately above (category parent) to which the category belongs. Is set in the category management information. In the case of the present embodiment, it is understood that “root” is the highest category because no parent category is set.

  When a record of type “content” is referred to, each content includes a content ID as identification information (ID) of the content, a content storage destination pointer indicating a storage location of the content in the content storage unit 25, the content If there is similar content in the parent category as the classification destination and the content, content management information in which the content ID of the similar content is associated is set. When the same content exists in the parent category, a category to be classified is set for each document in the parent category of the content. According to the setting examples shown in FIGS. 6 and 7, since the content with the content ID “0403” belongs to the categories “assembly drawing” and “part A”, the category ID of each category is set as the parent category. The It can also be seen that the content with the content ID “0405” is similar to the content with the content ID “0404”.

  Subsequently, the document information registration unit 155 registers the document information in the document information storage unit 26. An example of the data structure of the registered document information is shown in FIG. Document information is registered by associating a document name as document identification information with a content ID and a document attribute information storage destination pointer. In the content ID, the content ID of the content extracted from the document by the content extraction unit 13 as a storage target is set. In this way, a document is registered and recognized as a combination of contents. In the document attribute information storage destination pointer, pointer information indicating the storage location of the attribute information is set.

  As described above, the document information registration unit 155 registers the document as a content combination by generating document information by associating the document name with the content ID of the content included in the document ( Step 114). Then, the document information registration unit 155 further registers the document name in association with the attribute information of the document (step 115). The attribute information may be saved at this time, or may be saved prior to content registration at the time of acceptance in step 102.

  In the present embodiment, a document is registered as described above. Next, document search processing in the present embodiment will be described with reference to the flowchart shown in FIG. The document search process in the present embodiment is executed, for example, when it is desired to track a document when it is confirmed that the document has been leaked.

  When an application for document search processing is started in response to a user's predetermined operation, first, the category receiving unit 18 reads content category management information from the content category management information storage unit 24, and is set in the content category management information. Are displayed on the display 37 (step 121). In this case, the categories may be simply displayed as a list, but as illustrated in FIG. 7, the content category management information may be displayed so that the hierarchical relationship of the categories can be understood. Since the administrator knows the content included in the document to be tracked, that is, the content included in the leaked document and the category to which the content belongs, the administrator selects the category from the displayed items. Even if the administrator does not memorize the category, the leaked document is clear, so the category can be inferred from the content included in this document. Also, as shown in FIG. If the category management information is schematically displayed, it becomes easier to select a category. Note that it can be assumed that the document includes a plurality of contents. In this case, a category to which any one of the contents belongs may be selected.

  When the category receiving unit 18 receives the category selected by the administrator (step 122), the content display unit 19 refers to the content category management information and extracts content belonging to the selected category and ancestor category (step). 123). Then, the content is displayed on the display 37 (step 124).

  By the way, in this embodiment, when similar content exists, the difference from the similar content is extracted and stored. Therefore, when similar content exists in the display target content, the content display unit 19 reads the display target content (difference information) and the content of the similar content of the display target content from the content storage unit 25 to display the display target content. The content of is restored to a displayable image and then displayed.

  When the administrator selects content included in the document to be tracked from the content displayed on the display 37, the information display unit 20 receives the content (step 125), and the document information storage unit 26 based on the content. The document including the accepted content is specified by searching (step 126). If there are a plurality of documents including the same content, all documents are specified. And the information display part 20 reads the attribute information matched with the specified document, and displays it on the display 37 (step 127).

  Since the administrator can know the output person of the leaked document by referring to the user ID of the displayed attribute information, the leaked document can be traced by making an inquiry to the output person.

  In this case, since the purpose is to track the leaked document, it is sufficient to display at least the user ID included in the attribute information. However, in the case of a different purpose, other information of the attribute information and all contents included in the document For example, information regarding the document may be displayed.

  In this embodiment, as is clear from the document information shown in FIG. 7, the document is stored as a combination of contents, and information about which page of the document the content constitutes is not recorded. Of course, information such as a display page of content and an arrangement on the page may be recorded together. However, the leaked document is not always used as it is in the layout of the document, and there are not a few cases where only some contents are cut out and used. For this reason, in this embodiment, content is stored as a unit, and documents are managed in units of content.

  In the present embodiment, the display 37 is described as an example of the output destination of the content output means and the document information output means. However, the present invention is not limited to this, and for example, a print medium, an information terminal used by an administrator, Other output destinations such as transmission to other computers via storage means or a network may be selected.

  In this embodiment, the case where the information processing apparatus is realized by one computer has been described as an example. However, the information processing apparatus may be realized by a plurality of computers such as a document registration function and a search function. The image forming apparatus includes a computer (information processing apparatus). However, the image forming apparatus may be realized by an image forming apparatus that stores an image read by a scanner in an internal HDD.

  DESCRIPTION OF SYMBOLS 10 Document management apparatus, 11 Document data reception part, 12 Document attribute information reception part, 13 Content extraction part, 14 Category determination part, 15 Content management part, 16 Content extraction rule setting part, 17 Category classification rule setting part, 18 Category reception Unit, 19 content display unit, 20 information display unit, 22 content extraction rule storage unit, 23 category classification rule storage unit, 24 content category management information storage unit, 25 content storage unit, 26 document information storage unit, 31 CPU, 32 ROM 33 RAM, 34 Hard disk drive (HDD), 35 Mouse, 36 Keyboard, 37 Display, 38 Input / output controller, 39 Network controller, 40 Internal bus, 151 Difference calculation unit, 152 Difference content generation unit, 15 Content registration unit, 154 content category management information registration unit, 155 document information registration unit.

Claims (9)

A document receiving means for receiving a document to be stored;
Extraction means for extracting content from the document received by the document reception means based on content extraction definition information in which content to be stored among contents included in the document is defined;
Content registration means for registering the content extracted by the extraction means in content storage means;
Document information storage means for generating document information by associating the document identification information for identifying the document accepted by the document acceptance means with the content identification information of the content extracted from the document and stored in the content storage means Document information registration means to be registered in
An information processing apparatus comprising: When the same content as the content extracted by the extraction unit is already registered in the content storage unit,
The content registration means does not register the content extracted by the extraction means in the content storage means,
The document information registering means generates document information by associating the content identification information of the same content with the document identification information;
The information processing apparatus according to claim 1. The content registration means, when content similar to the content extracted by the extraction means is registered in the content storage means, the difference between the content extracted by the extraction means and the content similar to the content extracted by the extraction means Register information as content in the content storage means,
The document information registration unit generates document information by associating content identification information of the difference information with the document identification information.
The information processing apparatus according to claim 1.   The information processing apparatus according to claim 3, further comprising a restoring unit that restores the content with reference to content management information that associates the similar content with the difference information extracted by the extracting unit. Content output means for outputting content registered in the content storage means;
Content accepting means for accepting content selected from the content output by the output means;
Document information output means for outputting information relating to a document including the content received by the content receiving means;
The information processing apparatus according to claim 1, further comprising: The content extraction definition information defines content that enables document tracking,
6. The information processing apparatus according to claim 5, wherein the content receiving unit receives content included in a leaked document. Attribute information receiving means for receiving attribute information of the document including the output person of the document to be stored;
The document information registration unit associates the attribute information of the document with the document identification information,
The information processing apparatus according to claim 6, wherein the document information output unit outputs attribute information of the document as information related to the document. When content is classified into categories and registered in the content storage means, it has category determination means for determining a category as a classification destination of the content extracted by the extraction means,
The content registration means classifies the content extracted by the extraction means into a category accepted by the category determination means and registers it in the content storage means,
When a category is specified when outputting information about the document, the content output unit extracts the specified category and the content classified into a category including the category in a lower layer from the content storage unit. The information processing apparatus according to claim 5, wherein the information processing apparatus is displayed. Computer
A document receiving means for receiving a document to be stored;
Extraction means for extracting content from a document received by the document reception means based on content extraction definition information in which content to be stored among contents included in the document is defined;
Content registration means for registering the content extracted by the extraction means in content storage means;
Document information storage means for generating document information by associating the document identification information for identifying the document accepted by the document acceptance means with the content identification information of the content extracted from the document and stored in the content storage means Document information registration means to be registered in
Program to function as.

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