JP2011076139A - Document management device, information processing apparatus, system and program for managing document - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid deterioration of performance, in a document management system including a document management device and an information processing apparatus mutually connected through a network in a data-communicable manner, by enhancing the efficiency of document data identity determination processing performed to determine the necessity of update when document data retained by the information processing apparatus are updated. <P>SOLUTION: The document management device 1 is connected to the information processing apparatus 11 through the network in a data-communicable manner, and manages document data composed of a plurality of document components while sharing it with the information processing apparatus. The document management device generates a hash value corresponding to the content of each document component that is a transmission object, further integrates the hash values to generate an integrated hash value, and performs, when document data retained in the information processing apparatus 11 is used, identity determination for the document data by comparison of the hash value and integrated hash value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a document management apparatus, an information processing apparatus, a document management system, and a document management program, and more particularly to a technique for managing document data when document data is shared.

  2. Description of the Related Art Conventionally, there is a client / server type data management system that includes a server that manages data and a client that is connected to the server via a network so that data communication is possible. In such a data management system, the same data as the data managed by the server is held by the client, and when the data managed by the server is updated, the data held by the client is updated. Exists. When such updates are performed, data is transmitted and received between the server and the client, so if the number of updates increases, the network traffic is overwhelmed and the performance of the document management system decreases. To do. Therefore, when performing such an update, the identity of the contents of the data is determined in advance so that the update is not performed until the contents of the data to be updated are the same. There is a technique for preventing the deterioration of the performance of the data management system (for example, Patent Document 1).

JP 2003-122618 A

  For example, in Patent Document 1, in a database download system including a server that can create digest data from column data of a master database held by the own device, the latest digest data and the latest column data downloaded by a client are recorded. A technique for determining whether or not the column data of the master database has been updated since the most recent download by comparing with the digest data is disclosed.

  In the client / server type data management system, there is a document management system in which a server is a document management apparatus, a client is an information processing apparatus, and a management target is document data. In such a document management system, the number of information processing apparatuses serving as clients tends to increase due to the recent increase in ownership of personal computers and the spread of personal computers with excellent portability. Therefore, if the document management system can request the document management apparatus to update the data held by the information processing apparatus, a large number of update requests are made from the information processing apparatus to the document management apparatus. It will be.

  In such an environment, when updating the document data held by the information processing apparatus as described above, the document data is not updated until the contents of the document data to be updated are the same. Therefore, a technique for determining the identity of data contents is often applied. If such a technique is applied, the performance degradation of the document management system is avoided to some extent. However, at least for each update request, the document management device and the information processing device exchange data to be updated, analyze the contents of the data held by each, and verify the identity. It is necessary to make a determination. Therefore, in the document management system as described above, the data identity discrimination process itself is a heavy burden.

  Conventionally, there is a technique for discriminating the contents of data using the update date of the data. That is, the update date of the data held by the document management device is compared with the update date of the data held by the information processing device, and if the update date held by the data is the same, the content of the data is determined to be the same, and the document management Data is not transmitted from the apparatus to the information processing apparatus, and if the update date of the data is different, it is determined that the data content is different, and the data is transmitted. In this technology, in order to perform the determination, it is only necessary to transmit / receive only the update date data, not the data to be updated, between the document management apparatus and the information processing apparatus. It will be suppressed.

  However, this technique also has the following two problems. First, for example, when a plurality of document data is stored in one folder, when the identity of all the plurality of document data is determined, the update dates are compared for each of the plurality of document data. It must be made. For this reason, the greater the number of document data stored in the folder, the greater the number of transmission / reception of the update date and the number of comparisons, and the greater the processing load on the document management system. For example, the same can be said when one document data is composed of a plurality of document components. In other words, when determining the identity of one document data, it is necessary to compare the update date for each of a plurality of document components, the more the number of document components constituting the document data, There is a problem in that the number of comparisons of update dates increases and the processing load increases. Second, even if the data update date is different, the data contents may be the same. In such a case, useless data transmission / reception is performed between the document management apparatus and the information processing apparatus, and the document There is a problem that the processing load of the management system increases.

  The second problem can be solved by a technique for comparing the digest data corresponding to the data contents and determining the identity of the data contents as in Patent Document 1, for example. However, even such a technique cannot solve the first problem. That is, when the document data is composed of a plurality of document components and the number of such document components is large, the number of comparisons of digest data increases, and whether the document data is the same as a whole. When this is determined, efficient determination cannot be performed, which places a burden on the document management system.

  The present invention has been made to solve the above two problems, and is a process for determining the identity of the content of document data to be transmitted, which is performed when document data held by the information processing apparatus is updated. Management apparatus that prevents unnecessary data transmission / reception between the document management apparatus and the information processing apparatus and avoids a decrease in the performance of the document management system by suppressing the number of data comparisons An object of the present invention is to provide an information processing apparatus, a document management system, a document management program, and an information processing program.

  To achieve the above object, the invention according to claim 1 includes document data storage means for storing a plurality of document data in a predetermined storage unit, and performs data communication with an information processing apparatus connected via a network. A document management apparatus that manages the plurality of document data stored in the storage unit and the plurality of document data stored in a predetermined storage area in the information processing apparatus so as to maintain the same. Generate document digest data corresponding to the contents of each document data stored in the storage unit, and based on the plurality of document digest data generated from each of the plurality of document data stored in the storage unit, Integrated digest data generating means for generating composite digest data corresponding to the contents of the document digest data, and stored in the storage unit Judgment is made by comparing the composite digest data generated by the integrated digest data generation means whether there are different contents between the plurality of document data and the plurality of document data stored in the predetermined storage area. And a data discriminating means.

  According to a second aspect of the present invention, in the document management apparatus according to the first aspect, the data discriminating unit stores the document data stored in the predetermined storage area among the plurality of document data stored in the storage unit. What is different from the contents is specified by comparing the document digest data generated by the integrated digest data generating means.

  According to a third aspect of the present invention, in the document management apparatus according to the first or second aspect, the document data stored in the storage unit is composed of a plurality of document components, and the contents of each document component A digest data generating unit that generates digest data corresponding to the document data, wherein the integrated digest data generating unit generates a plurality of digest data generated from each of a plurality of document constituent elements constituting the document data stored in the storage unit. Based on the above, document digest data corresponding to the contents of each document data is generated.

  According to a fourth aspect of the present invention, in the document management apparatus according to the third aspect, the data discriminating unit is configured to store the predetermined storage among the plurality of document constituent elements constituting the document data stored in the storage unit. What is different from the document constituent elements constituting the document data stored in the area is specified by comparing the digest data generated by the digest data generating means.

  According to a fifth aspect of the present invention, there is provided document data storage means for storing a plurality of document data in a predetermined storage unit, and the storage unit is configured to perform data communication with an information processing apparatus connected via a network. A document management device that manages a plurality of stored document data and a plurality of document data stored in a predetermined storage area in the information processing device so as to maintain the same, and is stored in the storage unit The document digest data corresponding to the contents of each document data is generated, and based on the plurality of document digest data generated from each of the plurality of document data stored in the storage unit, the contents of the plurality of document digest data are changed. Integrated digest data generating means for generating corresponding composite digest data, and a plurality of document data stored in the storage unit; In order to determine whether there is a different content from the plurality of document data stored in the predetermined storage area by comparing the composite digest data generated by the integrated digest data generation unit, the information And a data transmission means for transmitting the combined digest data to a processing device.

  According to a sixth aspect of the present invention, there is provided an information processing apparatus connected to the document management apparatus according to the fifth aspect of the present invention via a network so as to be capable of data communication, wherein the data stores a plurality of document data in a predetermined storage area. Whether there are different contents between the storage means, the plurality of document data stored in the predetermined storage unit of the document management apparatus, and the plurality of document data stored in the predetermined storage area And a data discriminating means for judging by comparing the composite digest data generated in the document management apparatus.

  According to a seventh aspect of the present invention, there is provided a plurality of documents in which an information processing apparatus and a document management apparatus are connected to each other via a network so as to be able to perform data communication with each other, and are held by each of the information processing apparatus and the document management apparatus. A document management system that manages data so as to maintain the sameness, wherein the document management device includes a document data storage unit that stores a plurality of document data in a predetermined storage unit, and each of the storage units stored in the storage unit Document digest data corresponding to the content of the document data is generated, and based on the plurality of document digest data generated from each of the plurality of document data stored in the storage unit, the content of the plurality of document digest data is supported Integrated digest data generation means for generating composite digest data, and the information processing apparatus stores the composite digest data in a predetermined storage area. And at least one of the document management device and the information processing device includes a plurality of document data stored in the storage unit and a plurality of document data stored in the storage area. It is a configuration characterized by comprising data discriminating means for judging whether there is a document whose content differs from that of the document data by comparing the synthesized digest data generated by the integrated digest data generating means.

  According to an eighth aspect of the present invention, there is provided an information processing apparatus which is executed by a document management apparatus having document data storage means for storing a plurality of document data in a predetermined storage unit and connected to the document management apparatus via a network. A document management program for maintaining identity between a plurality of document data stored in the storage unit and a plurality of document data stored in a predetermined storage area in the information processing apparatus by performing data communication. Generating a document digest data corresponding to the content of each document data stored in the storage unit in the document management device, and a plurality of document data generated from each of the plurality of document data stored in the storage unit On the basis of the document digest data, composite digest data corresponding to the contents of the plurality of document digest data is generated. Whether or not there is a different content between the plurality of document data stored in the storage unit and the plurality of document data stored in the predetermined storage area. And a step of determining by comparing the two.

  The invention according to claim 9 is an information processing apparatus that is executed by a document management apparatus having a document data storage unit that stores a plurality of document data in a predetermined storage unit, and that is connected to the document management apparatus via a network. A document management program for maintaining identity between a plurality of document data stored in the storage unit and a plurality of document data stored in a predetermined storage area in the information processing apparatus by performing data communication. Generating a document digest data corresponding to the content of each document data stored in the storage unit in the document management device, and a plurality of document data generated from each of the plurality of document data stored in the storage unit On the basis of the document digest data, composite digest data corresponding to the contents of the plurality of document digest data is generated. Whether or not there is a different content between the plurality of document data stored in the storage unit and the plurality of document data stored in the predetermined storage area. In order to make a determination based on the comparison, the step of transmitting the synthesized digest data to the information processing apparatus is executed.

  According to the present invention, digest data corresponding to the content of the data to be transmitted is integrated in the process of determining the identity of the content of the data to be transmitted, which is performed when the data held by the information processing apparatus is updated. By using the document digest data and composite digest data generated in this way for the determination, it is possible to prevent unnecessary data transmission / reception between the document management apparatus and the information processing apparatus and to reduce the number of data comparisons. . Therefore, it is possible to avoid the performance degradation of the document management system.

It is a figure which shows the example of 1 structure of a document management system. It is a figure which shows an example of document data. It is a block diagram which shows an example of the hardware constitutions of a document management apparatus. It is a block diagram which shows an example of the hardware constitutions of information processing apparatus. It is a block diagram which shows the detailed functional structure implement | achieved when the control part of a document management apparatus performs a program. It is a conceptual diagram of the generation of the hash value of the document component and the document hash value of the document data. It is a conceptual diagram of folder hash value generation of a folder. It is a block diagram which shows the detailed functional structure implement | achieved when the control part of information processing apparatus runs a system program and an application program. 10 is a flowchart illustrating an example of a processing procedure when a document management apparatus receives a document component from an information processing apparatus. 10 is a flowchart illustrating an example of a processing procedure when a document management apparatus receives a hash value / integrated hash value request from an information processing apparatus. 10 is a flowchart illustrating an example of a processing procedure when a user clicks a folder in the information processing apparatus. It is a flowchart which shows an example of the detailed process sequence of a data determination process. It is a figure for demonstrating a data discrimination | determination process by a specific example. It is a figure for demonstrating a data discrimination | determination process by a specific example. It is a figure for demonstrating a data discrimination | determination process by a specific example.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments described below, members that are common to each other are denoted by the same reference numerals, and redundant descriptions thereof are omitted.

  FIG. 1 is a diagram illustrating a configuration example of a document management system according to the present embodiment. This document management system is a so-called client-server type document management system, and includes a document management apparatus 1 that functions as a server and a plurality of information processing apparatuses 11 (11a, 11b,...) That function as clients. ing. The document management apparatus 1 and the plurality of information processing apparatuses 11 are connected to each other via a network 10 such as a LAN or a WAN so as to be able to perform data communication with each other.

  In the document management system, the document management apparatus 1 and the information processing apparatus 11 hold the same document data, and when the document data held by the document management apparatus 1 is updated, the information processing apparatus 11 updates the updated document data. Is downloaded from the document management apparatus 1 so that the consistency of the document data held in each of the document management apparatus 1 and the information processing apparatus 11 is maintained. Therefore, the document management apparatus 1 holds document data corresponding to the document data held in the information processing apparatus 11 via the network 10. Here, the correspondence between the document data held in the document management apparatus 1 and the document data held in the information processing apparatus 11 is determined by a predetermined property of the document data, such as a file name. In other words, if the properties of the document data held in the document management device 1 and the properties of the document data held in the information processing device 11 match each other, the document data are data corresponding to each other.

  In the example of FIG. 1, the document management apparatus 1 holds document data 100a. At this time, the information processing apparatus 11a holds document data 100b having the same property as the document data 100a, and the information processing apparatus 11b holds document data 100c having the same property as the document data 100a. In this case, the document data 100a held in the document management apparatus 1 and the document data 100b and 100c held in the information processing apparatuses 11a and 11a are data corresponding to each other.

  FIG. 2 is a diagram showing an example of the document data 100 in the present embodiment. Here, the document data 100 is a general term for the document data 100a held by the document management apparatus 1 and the document data 100b and 100c held by the information processing apparatuses 11a and 11a, respectively. This document data 100 is composed of a plurality of document components 190. Examples of the document component 190 include the document body data 101, the thumbnail 102, the database 103, and the security information 104. The document body data 101 refers to a document file body such as a text file. A thumbnail 102 is thumbnail data of the document body data 101. The database 103 is database data for managing property information of the document body data 101, for example, owner information and access rights of the document body data 101. The security information 104 is data relating to the security of the document body data 101 such as an electronic signature.

  The document data 100 includes at least document body data 101 as the document component 190. Whether or not the document data 100 includes three document components other than the document body data 101 is arbitrary. That is, the document data 100 may be composed of only the document body data 101, or may be composed of three document components 190, that is, the document body data 101, the database 103, and the security information 104. Note that the database 103 is not necessarily limited to managing the property information of the document main body data 101, but may be other information. Further, the document data 100 may include other data as the document component 190.

  Returning to FIG. 1, the document management apparatus 1 holds a document component 190a as data constituting the document data 100a. The document constituent element 190a corresponds to the document constituent element 190b constituting the document data 100b held in the information processing apparatus 11a. The document component 190a corresponds to the document component 190c constituting the document data 100c held in the information processing apparatus 11b. The correspondence between the document component 190a held in the document management device 1 and the document components 190b and 190c held in the information processing devices 11a and 11b is determined based on whether or not they are the same type of document component. For example, it is determined by the extension of data. If the document constituent element 190a of the document data 100a and the document constituent elements 190b and 190c of the document data 100b and 100c are the same kind of document constituent elements, they become corresponding document constituent elements.

  In the example of FIG. 1, the document data 100a held by the document management apparatus 1 includes a document component 190a. At this time, the document data 100b held by the information processing apparatus 11a includes the same kind of document constituent element 190b as the document constituent element 190a, and the document data 100c held by the information processing apparatus 11b includes the same kind of document constituent element 190a. A document component 190c is included. Specifically, if the document data 100a held by the document management apparatus 1 includes the thumbnail 102, the document data 100b held by the information processing apparatus 11a also includes the corresponding thumbnail 102. Similarly, if the database 103 is included in the document data 100a, the corresponding database 103 is also included in the document data 100c held by the information processing apparatus 11b.

  The document management system according to the present embodiment is configured so that the contents of the document data 100a held by the document management apparatus 1 and the contents of the document data 100b and 100c held by each information processing apparatus 11 are the same. Data is transmitted and received between the apparatus 1 and the information processing apparatus 11 via the network 10. Here, the contents of the document data 100a and the document data 100b are the same. The contents of the document component 190a included in the document data 100a and the contents of the document component 190b included in the document data 100b are all the same. Say something. For example, the document data 100a includes document body data 101a, a thumbnail 102a, a database 103a, and security information 104a. The document data 100b includes document body data 101b, a thumbnail 102b, a database 103b, When the security information 104b is configured, the document main body data 101a and 101b have the same contents, the thumbnails 102a and 102b have the same contents, the databases 103a and 103b have the same contents, and the security information If the contents 104a and 104b have the same contents, the contents of the document data 100a and the contents of the document data 100b are the same. Similarly, the contents of the document data 100a and the document data 100c being the same means that the contents of the document constituent element 190a and the contents of the document constituent element 190c are all the same.

  The document management apparatus 1 stores and manages the document data 100a in a predetermined folder 200a. The information processing apparatus 11a stores and manages the document data 100b in the folder 200b corresponding to the folder 200a in the document management apparatus 1. Similarly, the information processing apparatus 11a stores and manages the document data 100c in a folder 200c corresponding to the folder 200a in the document management apparatus 1. Here, the correspondence between the folder 200a in the document management apparatus 1 and the folders 200b and 200c in the information processing apparatus 11 is determined by a predetermined property of each folder, such as a folder name. That is, if the properties of the folder 200a of the document management apparatus 1 and the properties of the folders 200b and 200c of the information processing apparatus 11 match each other, these folders are corresponding to each other. In the example of FIG. 1, the document management apparatus 1 stores document data 100a in a folder 200a. At this time, the information processing apparatus 11a stores the document data 100b in the folder 200b having the same folder name as the folder 200a, and the information processing apparatus 11b stores the document data 100c in the folder 200c having the same folder name as the folder 200a. .

  Therefore, in the document management system of this embodiment, the data holding structure of the document data 100a in the document management apparatus 1 is the same as the data holding structure of the document data 100b and 100c in the information processing apparatus 11, and the document management apparatus 1 and the information processing apparatus 11 share the same document data.

  The information processing apparatus 11 (11a, 11b,...) Is configured by, for example, a commercially available personal computer (PC). The information processing apparatus 11 a can update the document data 100 a held by the document management apparatus 1 via the network 10. That is, the content of the document data 100 a held by the document management apparatus 1 can be rewritten by the document management apparatus 1 by transmitting the document data 100 b to the document management apparatus 1. Further, the information processing apparatus 11 can update the content of the document data 100 b held by the information processing apparatus 11 with the document data 100 a received from the document management apparatus 1 via the network 10. Similarly, the information processing apparatus 11b can update the document data 100a held by the document management apparatus 1 with the document data 100c held by the own apparatus, and the document management apparatus 1 holds the document data 100c held by the own apparatus. It can be updated by 100a.

  In the document management system of this embodiment, when a user of the information processing apparatus 11 uses the document data 100, the document data 100 referred to by the information processing apparatus 11 is the document data 100 held in the information processing apparatus 11. . That is, the user browses the document data 100 held by the information processing apparatus 11. Here, for example, when the user of the information processing apparatus 11a edits the document data 100b and updates the document data 100b, the information processing apparatus 11 transmits the updated document data 100b to the document management apparatus 1 accordingly. Then, the content of the document data 100a is updated to the content of the updated document data 100b. Then, the information processing apparatus 11b holds document data 100c having contents different from the document data 100a held by the document management apparatus 1. In this state, if the information processing apparatus 11b displays the document data 100c held by itself as it is to the user, the user uses the document data 100c having a different content from the document data 100a held by the document management apparatus 1. This makes it difficult to unify documents.

  Therefore, in the client-server type document management system according to the present embodiment, when the document data 100b and 100c held in each information processing apparatus 11 is used, the document data 100a held in the document management apparatus 1 is updated. If the data is updated to different data as a result, the information processing apparatus 11 downloads the updated document data 100a from the document management apparatus 1, and uses the document data 100a. The document data 100b and 100c held in each information processing apparatus 11 are configured to be updated. As a result, each information processing apparatus 11 can display to the user based on the updated document data 100b and 100c, and can unify documents used in the entire system.

  Hereinafter, such a document management system will be described in more detail. Since each of the plurality of information processing apparatuses 11 provided in the document management system has the same function and configuration as the information processing apparatus 11a, the information processing apparatus 11 will be described below as an example of the information processing apparatus 11. To do.

  FIG. 3 is a block diagram illustrating an example of a hardware configuration of the document management apparatus 1. As shown in FIG. 3, the document management apparatus 1 includes a control unit 20, a network interface 23, and a storage device 30, which are connected via a data bus 24. The control unit 20 includes a CPU 21 and a memory 22. The CPU 21 reads out and executes a program 33 stored in the storage device 30, thereby controlling the operation of each unit. The memory 22 is for storing temporary data and the like when the CPU 21 executes the program 33.

  The network interface 23 is for performing data communication with the information processing apparatus 11 via the network 10.

  The storage device 30 is configured by a nonvolatile storage device such as a hard disk device, for example. The storage device 30 stores a program 33 installed in advance in the document management device 1. Further, the storage device 30 is provided with a document data storage unit 31 for storing the document data 100a, and a hash value / integrated hash value storage unit 32 for storing the hash value and the integrated hash value generated in the document management device 1. The hash value and the integrated hash value are data of a certain length corresponding to the contents of document data and the like, which will be described later. Further, as described above, the folder 200a corresponding to the folder 200b of the information processing apparatus 11 is provided in the document data storage unit 31 as a storage area (storage unit) for storing the document data 100a.

  FIG. 4 is a block diagram illustrating an example of a hardware configuration of the information processing apparatus 11a. As shown in FIG. 4, the information processing apparatus 11 a includes a control unit 40, a network interface 43, a display unit 44, an input unit 45, and a storage device 50, which are connected via a data bus 46. Yes.

  The control unit 40 includes a CPU 41 and a memory 42. The CPU 41 reads out and executes the programs 53 and 54 stored in the storage device 50, thereby performing control of each unit and various arithmetic processes. The memory 42 stores data temporarily generated when the programs 53 and 54 are executed.

  The network interface 43 is for performing data communication with the document management apparatus 1 via the network 10.

  The display unit 44 is a display unit that displays document information based on document data or displays other information, and includes a liquid crystal display, for example. The input unit 45 is an input unit that inputs various signals when operated by a user, and includes, for example, a keyboard and a mouse.

  The storage device 50 is configured by a nonvolatile storage device such as a hard disk device, for example. The storage device 50 stores programs 53 and 54 installed in advance in the information processing apparatus 11. The system program 53 is an operating system. The application program 54 is a program for browsing the document data 100b held by the device itself, updating the document data 100a held by the document management apparatus 1, and the like. The storage device 50 includes a document data storage unit 51 that stores the document data 100b, and a hash value / integrated hash value storage unit 52 that stores hash values and integrated hash values received from the document management device 1. Here, in the document data storage unit 51, as described above, the folder 200b corresponding to the folder 200a of the document management apparatus 1 is provided as a storage area for storing the document data 100b.

  As described above, the information processing apparatus 11a can update the document data 100a held by the document management apparatus 1 with the document data 100b held by the information processing apparatus 11a. Similarly, the other information processing apparatus 11b may update the document data 100a held in the document management apparatus 1. When the other information processing apparatus 11b updates the document data 100a held by the document management apparatus 1, the document data 100b held by the information processing apparatus 11a has different data from the document data 100a of the document management apparatus 1. . Therefore, the information processing apparatus 11a updates the document data 100b held by the own apparatus with the document data 100a held by the document management apparatus 1 so that the document data 100b has the same content as the document data 100a. . In the present embodiment, in the process in which the information processing apparatus 11a is downloaded from the document management apparatus 1 and the document data 100b is updated, for example, the user instructs the information processing apparatus 11a to browse the document data 100b. When it comes to being.

  At this time, in the present embodiment, among the document constituent elements 190a included in the document data 100a held by the document management apparatus 1, the document constituent elements included in the document data 100b selected as a browsing target or the like by the information processing apparatus 11a. It is determined whether or not there is something different in content from 190b. If there is something different in content, the document component 190a is specified. Such determination processing may be performed in the information processing apparatus 11a or may be performed in the document management apparatus 1. When a document component 190a having a content different from that of the document component 190b is specified, the document management apparatus 1 transmits only the specified document component 190a to the information processing apparatus 11a. Thereby, the document data 100b held by the information processing apparatus 11a can be updated. In this embodiment, the case where such a determination process is performed by the information processing apparatus 11a is illustrated. By performing the discrimination process in the information processing apparatus 11a, for example, even when the number of information processing apparatuses 11 connected to the document management apparatus 1 via the network 10 is large, the burden on the processing performance of the document management apparatus 1 is large. Can be reduced.

  When the information processing apparatus 11a performs the determination process, the determination is performed with reference to the hash value (digest data) generated by the document management apparatus 1. This will be described in detail below. In the present embodiment, a hash value (digest data) that is data corresponding to the contents of the document component 190a or the document component 190b and a document hash value (data corresponding to the contents of the document data 100a or the document data 100b) ( Document constituent element 190a having a different content from document constituent element 190b using three types of hash values: document digest data) and folder hash value (synthetic digest data) corresponding to the contents of folder 200a or folder 200b. It is determined whether or not exists. The contents of the folder corresponding to the folder hash value will be described later.

  First, processing performed in the document management apparatus 1 will be described. The document management apparatus 1 generates a hash value corresponding to the contents of each document component 190a from each of the plurality of document components 190a. Next, a document hash value corresponding to the contents of the document data 100a and a folder hash value corresponding to the contents of the folder 200a are generated. In the document management apparatus 1, these various hash values are stored in association with the data holding structure of the document data 100a. Then, when there is a transmission request for the document component 190a from the information processing device 11a, the document management device 1 transmits these hash values together with the document component 190a to the information processing device 11a. As a result, the information processing apparatus 11a holds a hash value corresponding to the data holding structure of the document data 100b.

  If the document data 100a or its document component 190a held in the document management device 1 and the document data 100b or its document component 190b held in the information processing device 11a have the same contents, the document management device 1 The various hash values held and the various hash values held by the information processing apparatus 11a coincide with each other. On the other hand, if the document data 100a or its document component 190a held in the document management apparatus 1 and the document data 100b or its document component 190b held in the information processing apparatus 11a have different contents from each other. The various hash values held in the document management apparatus 1 are different from the various hash values held in the information processing apparatus 11a.

  Therefore, in the present embodiment, when the information processing apparatus 11a performs the determination process, the document management apparatus 1 acquires various hash values held at that time, and the hash value held in the information processing apparatus 11a Make a comparison. Specifically, it is determined whether or not the contents of the document data 100a and the document data 100b are different by comparing the document hash value and the folder hash value. A document component 190a having a content different from that of the component 190b is specified. Accordingly, for example, when the contents of the document data 100a and the document data 100b are the same, if the document hash values of these document data are compared, the document constituent element 190a and the document constituent element 190b are not individually compared. In addition, it is found that the document component 190a and the document component 190b are all composed of document components having the same data contents. Further, if the folder hash value of the folder 200a and the folder hash value of the folder 200b are compared, even if a plurality of document data is stored in each of the folders 200a and 200b, they are individually compared. It turns out that all the document data has the same content without. In this case, it becomes clear that the document component 190a and the document component 190b all have the same content without individually comparing each of the plurality of document components 190 included in each document data.

  As described above, in the present exemplary embodiment, when determining whether there is a document component 190a held in the document management apparatus 1 that has a content different from that of the document component 190b held in the information processing apparatus 11a. The hash value comparison is performed in the order of the folder hash value, the document hash value, and the hash value. By using such a discriminating method, it is possible to suppress the number of comparisons of data necessary to specify all document components having different contents, and to avoid a decrease in the performance of the document management system.

  Here, in the present embodiment, the document hash value and the folder hash value are collectively referred to as an integrated hash value. Therefore, in the above-described determination method, first, using the integrated hash value, it is determined whether or not the contents of the folder 200a and the contents of the folder 200b are different. If they are different, then the contents of the document data 100a and the contents of the document data 100b are determined. It is determined whether or not. If the document component 190a is different, the hash value is used to specify a document component 190a having a different content from the document component 190b.

  In such a document management system of the present embodiment, when a user tries to use the document data 100b using the information processing apparatus 11a, first, the document management is performed on the information processing apparatus 11a in order to perform data discrimination. The hash value and the integrated hash value generated by the device 1 are transmitted. Then, after the information processing apparatus 11a performs data discrimination using the hash value and the integrated hash value received from the document management apparatus 1, if there is a document constituent element 190a whose contents are different from the document constituent element 190b, the document configuration The document management apparatus 1 is requested to transmit the element 190a. As a result, the document management apparatus 1 transmits only the requested document component 190a to the information processing apparatus 11a. Then, the information processing apparatus 11b updates the document component 190b held by the information processing apparatus 11b with the document component 190a received from the document management apparatus 1. By performing such a series of processing, the document data 100a and the document data 100b are configured as the same data content. That is, the sameness of data is maintained between the document management apparatus 1 and the information processing apparatus 11a.

  In this embodiment, since the above-described determination process is performed using a hash value and an integrated hash value, the data processing burden is reduced as compared with the conventional method, and a decrease in the performance of the entire document management system can be avoided. . In the example described above, the relationship between the information processing apparatus 11a and the document management apparatus 1 has been mainly described, but the same applies to the other information processing apparatus 11b.

  Next, specific internal functions in the document management apparatus 1 for realizing the operation as described above will be described. FIG. 5 is a block diagram showing a detailed functional configuration realized by the control unit 20 of the document management apparatus 1 executing the program 33. In FIG. 5, after updating the document data 100a held by the document management apparatus 1, a function for generating a hash value / integrated hash value for the newly updated document data 100a, and a user operating the information processing apparatus 11a When the document data 100b is to be browsed, only the block relating to the function of the document management apparatus 1 transmitting the document component 190a to the information processing apparatus 11a is used to make the document data 100a and the document data 100b have the same contents. The other functions are not shown.

  As shown in FIG. 5, the control unit 20 executes a program 33 to thereby generate a document data update unit 60, a hash value generation unit 61, an integrated hash value generation unit 62, a document hash value generation unit 63, and a folder hash value generation. Functions as a unit 64, a hash value / integrated hash value transmission unit 65, and a document component transmission unit 66.

  The document data update unit 60 updates the document data 100 a held by the document management apparatus 1. Specifically, when the document component 190b is transmitted from the information processing apparatus 11a, the document component 190a stored in the document data storage unit 31 is rewritten to the transmitted document component 190b. As a result, the content of the document component 190a becomes the same as the content of the transmitted document component 190b.

  The hash value generation unit 61 functions when the document data 100a is updated by the document data update unit 60, and generates a hash value from the document component 190a rewritten by the document data update unit 60. Specifically, the document component 190a rewritten by the document data update unit 60 is input to a predetermined hash function stored in the storage device 30, and data having a certain length corresponding to the content of the document component 190a is input. Get the output of some hash value. That is, the hash value generation unit 61 generates a hash value corresponding to the rewritten content of the document component 190 a rewritten by the document data update unit 60. Here, the hash function refers to a function that outputs data of a certain length corresponding to the content of input data. The hash function outputs different data as a hash value when the contents of input data are different. Therefore, by comparing the hash values that are the outputs of the hash functions, it is possible to specify a document component 190a having a different content from the document component 190b. The hash value generation unit 61 updates the hash value stored in the hash value storage unit 34 provided in the hash value / integrated hash value storage unit 32 with the hash value generated as described above. Specifically, the hash value of the document component 190a before rewriting by the document data updating unit 60 stored in the hash value storage unit 34 is newly generated as described above, and the document component 190a after rewriting is newly generated. Rewrite to the hash value of.

  FIG. 6A is a conceptual diagram of document hash value generation of the document data 110 a updated by the document data update unit 60. Here, the document data 110a is an example of the document data 100a. That is, it is assumed that the document management apparatus 1 holds the document data 110a, and the information processing apparatus 11a holds the document data 110b having the same property as the document data 110a. In FIG. 6, there are four document components 190a, ie, document body data 111a, thumbnail 112a, database 113a, and security information 114a, all of which have been rewritten by the document data update unit 60. In this case, the hash value generation unit 61 inputs the document body data 111a to the hash function 80, and obtains a hash value 311a corresponding to the contents of the document body data 111a. The thumbnail 112a is input to the hash function 80, and a hash value 312a corresponding to the contents of the thumbnail 112a is obtained. Further, the database 113a is input to the hash function 80, and a hash value 313a corresponding to the contents of the database 113a is obtained. Also, the security information 114a is input to the hash function 80, and a hash value 314a corresponding to the contents of the security information 114a is obtained. As described above, the hash value generation unit 61 generates a hash value of each document component 190a included in the document data 110a updated by the document data update unit 60.

  The integrated hash value generation unit 62 includes a document hash value generation unit 63 and a folder hash value generation unit 64. The document hash value generation unit 63 generates a document hash value, and the folder hash value generation unit 64 generates a folder hash value. When a new hash value is generated by the hash value generation unit 61, the document hash value generation unit 63 functions. After the generation of the document hash value by the document hash value generation unit 63 is finished, the folder hash value generation unit 64 Function.

  The document hash value generation unit 63, for the document data 100a updated by the document data update unit 60, a document hash value corresponding to the content of the document data 100a based on each of the plurality of document components 190a constituting the document data 100a. Is generated. Specifically, a plurality of hash values corresponding to the contents of the plurality of document constituent elements 190a constituting the document data 100a are input to a hash function, and the data has a fixed length corresponding to the contents of the document data 100a. Get the output of a document hash value. At this time, for the document component 190a rewritten by the document data update unit 60, the hash value generated by the hash value generation unit 61 is used, and the document component 190a that has not been rewritten by the document data update unit 60 is: The hash value read from the hash value storage unit 34 is used. That is, the document hash value generation unit 63 generates a document hash value corresponding to the updated content of the document data 100a updated by the document data update unit 60. Similar to the hash value, such a document hash value is output as a hash value having a different value if at least one of the plurality of hash values input to the hash function is different. Therefore, if the document hash values are compared, whether or not the contents of the plurality of document components 190a constituting the document data 100a are different from the contents of the plurality of document components 190b constituting the document data 100b. Can be determined.

  FIG. 6B is a conceptual diagram of document hash value generation of the document data 110a. In FIG. 6A, the document hash value generation unit 63 includes a hash value 311a generated from the document body data 111a by the hash value generation unit 61, a hash value 312a generated from the thumbnail 112a by the hash value generation unit 61, and a hash value. The hash value 313a generated by the generation unit 61 from the database 113a and the hash value 314a generated by the hash value generation unit 61 from the security information 114a are input to the hash function 80, and the document hash value corresponding to the content of the document data 110a 410a is obtained.

  After the document hash value generation unit 63 generates the document hash value as described above, the folder hash value generation unit 64 uses the folder 200a in which the document data 100a updated by the document data update unit 60 is stored. Generate a hash value. Specifically, the following two generation methods are executed depending on whether or not the folder 200a has a lower folder.

  (1) For a folder 200a having no lower folder, a folder hash value corresponding to the plurality of document hash values is obtained from a plurality of document hash values corresponding to the contents of all the document data 100a stored in the folder. Generate. Specifically, a plurality of document hash values corresponding to the contents of the plurality of document data 100a stored in the folder are input to a hash function stored in the storage device 30, and the plurality of document hashes are input. An output of a folder hash value that is data of a certain length corresponding to the value is obtained. At this time, for the document data 100a updated by the document data update unit 60, the document hash value generated by the document hash value generation unit 63 is used, and for the document data 100a not updated by the document data update unit 60, The document hash value read from the integrated hash value storage unit 35 is used.

  FIG. 7A is a conceptual diagram of folder hash value generation for the folder 210a having no lower folder. Here, the folder 210a is an example of the folder 200a. That is, it is assumed that the document management apparatus 1 has a folder 210a, and the information processing apparatus 11a has a folder 210b having the same properties as the folder 210a. In FIG. 7, it is assumed that all document data 100 a has been updated by the document data update unit 60. The folder 210a stores document data 110a, document data 120a, and document data 130a, which are examples of the document data 100a. After the document hash value generation unit 63 generates the document hash value 410a of the document data 110a, the document hash value 420a of the document data 120a, and the document hash value 430a of the document data 130a by the above-described document hash value generation method, the folder hash The value generation unit 64 inputs the document hash value 420, the document hash value 420, and the document hash value 440 to the hash function 80, and the contents of the document hash value 420, the contents of the document hash value 430, and the document hash value A folder hash value 510a of the folder 210a corresponding to the contents of 440 is obtained.

  (2) For a folder 200a having a lower folder, from a plurality of document hash values corresponding to the contents of all the document data 100a stored in the folder 200a and a folder hash value of a lower folder, A folder hash value corresponding to a plurality of document hash values and a folder hash value of a folder one level lower is generated. Specifically, a plurality of document hash values corresponding to the contents of each document data 100a stored in the folder 200a and a hash value of a folder one lower level are converted into a hash function stored in the storage device 30. Then, an output of a folder hash value which is data of a fixed length corresponding to the plurality of document hash values and the folder hash value of the folder one level lower is obtained. At this time, for the document data 100a updated by the document data update unit 60, the document hash value generated by the document hash value generation unit 63 is used, and for the document data 100a not updated by the document data update unit 60, The document hash value read from the integrated hash value storage unit 35 is used. Further, when the lower-order folder stores the document data updated by the document data update unit 60, the folder hash value generated by the folder hash value generation unit 64 is used. Furthermore, when only the document data that has not been updated by the document data update unit 60 is stored in the next lower folder, the folder hash value read from the integrated hash value storage unit 35 is used.

  FIG. 7B is a conceptual diagram of folder hash value generation for the folder 220a in which the lower folder exists. Here, the folder 220a is an example of the folder 200a. The folder 220a stores document data 140a and document data 150a, which are examples of the document data 100a, and a folder 210a exists as a lower folder. After the document hash value generation unit 63 generates the document hash value 440a of the document data 140a and the document hash value 450a of the document data 150a by the above-described document hash value generation method, the folder hash value generation unit 64 stores the folder hash value of the folder 210a. The hash value 510a is generated by the folder hash value generation method when the above-described lower folder does not exist. Then, the folder hash value generation unit 64 inputs the document hash value 440a, the document hash value 450a, and the folder hash value 510a to the hash function 80, and the contents of the document hash value 440a, the contents of the document hash value 450a, and A folder hash value 520a of the folder 220a corresponding to the contents of the folder hash value 510a is obtained.

  That is, when the document data 100a is updated by the document data update unit 60, the folder hash value generation unit 64 stores all of the folder storing the updated document data 100a and its upper folders in those folders. A hash value corresponding to the contents of the document hash values of all the document data 100a and the contents of the folder hash values of the folder one level lower is generated. Here, the folder hash value when there is no lower folder corresponds to the contents of the document hash values of all the document data 100a stored in the folder. In addition, the folder hash value when there is a lower folder is the contents of all the document data 100a stored in that folder and all the document data 100a stored in all lower folders than that folder. Corresponds to the content. Therefore, by comparing the folder hash values, it is determined whether or not there is a document data 100a stored in the folder and a folder lower than the folder that has a different content from the document data 100b. Can do. Thus, the folder hash value is digest data reflecting the contents of all the document data 100a stored in the folder and all the document components 190a constituting the document data 100a.

  The integrated hash value generation unit 62 stores the document hash value and the folder hash value generated as described above in the integrated hash value storage unit 35 provided in the hash value / integrated hash value storage unit 32. At this time, the integrated hash value generation unit 62 rewrites the document hash value and the folder hash value already stored in the integrated hash value storage unit 35 with the document hash value and the folder hash value generated as described above. Update the document hash value and folder hash value.

  The hash value / integrated hash value transmission unit 65 receives a hash value / integrated hash value request transmitted from the information processing apparatus 11a when the user tries to view the document data 100b in the information processing apparatus 11a. Functions and transmits the hash value and the integrated hash value to the information processing apparatus 11b. Specifically, the folder hash value of the folder 200a, the document hash value of the document data 100a, and the hash value of the document component 190a are read from the hash value / integrated hash value storage unit 32 and transmitted to the information processing apparatus 11a. To do.

  When the document component transmission unit 66 receives a document component transmission request transmitted from the information processing apparatus 11a that has completed the data determination process, the document component transmission unit 66 transmits the document component 190a requested to be transmitted. Specifically, the document constituent element 190a to be transmitted is specified from the document constituent element transmission request transmitted by the information processing apparatus 11a, the specified document constituent element 190a is read from the document data storage unit 31, and the information processing apparatus is read. To 11a.

  Next, specific internal functions in the information processing apparatus 11a will be described. FIG. 8 is a block diagram illustrating a detailed functional configuration that is realized when the control unit 40 of the information processing apparatus 11 a executes the system program 53 and the application program 54. In FIG. 8, for example, when the user selects and clicks on the folder 200b in which the document data 100b is stored, the document data 100a and the document data 100b are transmitted from the document management apparatus 1 so as to have the same contents. Based on the hash value / integrated hash value, it is determined whether or not there is a document component 190a having a content different from that of the document component 190b. If it exists, a transmission request for the document component 190a is made, and the document Only the block relating to the function of updating the document component 190b held by the information processing apparatus 11a by the component 190a is shown, and the other functions are not shown.

  As shown in FIG. 8, the control unit 40 executes the programs 53 and 54, thereby executing a document data management unit 70, a hash value / integrated hash value request unit 71, a data determination unit 72, a document component request unit 73, It functions as the data update unit 74.

  The document data management unit 70 manages the document data so that the contents of the document data 100b can be changed or viewed. Specifically, the document data management unit 70 uses the function of the application program 54 when the user who has read the document component 190b stored in the document data storage unit 51 changes the contents of the document component 190b. The changed document component 190b is transmitted to the document management apparatus 1, and the content of the document component 190b before the change stored in the document data storage unit 51 is changed to the content of the document component 190b after the change. rewrite. The changed document component 190b transmitted to the document management apparatus 1 is processed by the document data update unit 60. If the user clicks on the folder 200b via the input unit 45 in order to browse the document data 100b, for example, the hash value / integrated hash value request unit 71 provided in the document data management unit 70 functions. The document management apparatus 1 is requested to transmit the folder hash value of the folder 200a, the document hash value of the document data 100a, and the hash value of the document component 190a.

  The data discriminating unit 72 functions when the hash value / integrated hash value requesting unit 71 requests a hash value and an integrated hash value from the document management apparatus 1, and a document component 190a different from the document component 190b is managed by the document. If it is held by the device 1, this is specified. Specifically, the data discriminating unit 72 first receives a hash value and an integrated hash value from the document management apparatus 1, and uses the received hash value and integrated hash value to change the document data 100a whose contents are different from the document data 100b. It is determined whether or not exists. When different data exists, all of the document components 190a having different contents from the document component 190b are specified among the plurality of document components 190a included in the document data 100a. Further, the data determination unit 72 temporarily stores the hash value and the integrated hash value received from the document management apparatus 1 in the memory 42.

  The document component request unit 73 makes a transmission request for the document component 190 a specified by the data determination method performed by the data determination unit 72 to the document management apparatus 1.

  The data update unit 74 functions when the document component request unit 73 makes a transmission request, and updates the document component 190b, the hash value, and the integrated hash value. Specifically, first, the document component request unit 73 receives the document component 190a requested to be transmitted to the document management apparatus 1, and the contents of the document component 190b stored in the document data storage unit 51 are The content of the received document component 190a is rewritten. Then, the hash value of the document component element 190b stored in the hash value / integrated hash value storage unit 52 before the rewriting described above, the document hash value of the document data 100b configured by the document component element 190b, The folder hash value of the folder 200b for storing the document data 100b and the folder hash value of the upper folder of the folder 200a are rewritten to the hash value / integrated hash value temporarily stored in the memory 42 by the data determination unit 72 described above. .

  By updating the document component 190b by the data updating unit 74, the document data 100a and the document data 100b all have the same contents in the document management apparatus 1 and the information processing apparatus 11a. Therefore, the user can browse the document data 100b having the same contents as the document data 100a held in the document management apparatus 1 by the information processing apparatus 11a. In addition, by updating the document component 190b as described above, the information processing apparatus 11a causes the hash value not corresponding to the content of the document component 190b held by the own device and the content of the document data 100b held by the own device. The document hash value that does not correspond to the folder hash value and the folder hash value that does not correspond to the contents of the folder 200b held by the own device are stored. If the hash value and the integrated hash value are updated by the data update unit 74, information is stored. The processing apparatus 11a holds the hash value and the integrated hash value corresponding to the contents of the document component 190b, the contents of the document data 100b, and the contents of the folder 200b held by the processing apparatus 11a. Therefore, even if the user clicks on the folder 200b again and the data determination unit 72 performs data determination, the hash value / integrated hash value stored in the hash value / integrated hash value storage unit 52 is used. Therefore, it is not necessary to generate the hash value of the document component 190b held by the own device, the document hash value of the document data 100b held by the own device, and the folder hash value of the folder 200b held by the own device. A decrease in the performance of the document management system can be avoided.

  In the present embodiment, the data discrimination is performed by the information processing apparatus 11 without being performed by the document management apparatus 1. As a result, the processing burden on the document management apparatus 1 is reduced. In particular, as the number of information processing apparatuses 11 connected to the document management apparatus 1 via the network 10 so as to be able to perform data communication increases, the number of data processing requests from the information processing apparatus 11 to the document management apparatus 1 increases. Since the processing load of the apparatus 1 increases, the effect of avoiding the performance deterioration of the document management system due to the data determination performed by the information processing apparatus 11 is increased.

  FIG. 9 is a flowchart illustrating an example of a processing procedure when the document management apparatus 1 receives the document component 190b from the information processing apparatus 11a. The document management apparatus 1 monitors whether or not the document component 190b is received from the information processing apparatus 11a (step S101). If the document management apparatus 1 receives the document component 190b (YES in step S101), the document data update unit 60 functions to update the document data 100a held in the document management apparatus 1 by the received document component 190b. Perform (step S102). Thereafter, the hash value generation unit 61 functions to generate the hash value of the document component 190b received in step S101 (step S103), and update the hash value stored in the hash value storage unit 34 with the generated hash value Is performed (step S104). Then, the integrated hash value generation unit 62 functions and generates an integrated hash value from the hash value generated by the hash value generation unit 61 in step S103 (step S105). After that, the integrated hash value generation unit 62 updates the integrated hash value stored in the integrated hash value storage unit 35 in the hash value / integrated hash value storage unit 32 with the integrated hash value generated in step S105 ( Step S106) and the process ends.

  FIG. 10 is a flowchart illustrating an example of a processing procedure when the document management apparatus 1 receives a hash value / integrated hash value request from the information processing apparatus 11a. The document management apparatus 1 monitors whether or not a hash value / integrated hash value request has been received from the information processing apparatus 11a (step S201). If the document management apparatus 1 receives the hash value / integrated hash value request (YES in step S201), the hash value / integrated hash value transmission unit 65 functions to store the folder 200a, the document data 100a, and the document component 190a. The hash value / integrated hash value is transmitted to the information processing apparatus 11a (step S202). Thereafter, the document management apparatus 1 monitors whether a document component transmission request is received from the information processing apparatus 11a within a predetermined time (step S203). When a document component transmission request is received (YES in step S203), the document component transmission unit 66 functions and identifies the document component 190a to be transmitted from the received document component transmission request (step S204). . Then, the document component 190a specified in step S204 is transmitted to the information processing apparatus 11a (step S205), and the process ends. On the other hand, if the document component transmission request is not received within the predetermined time in step S203 (NO in step S203), the processing is terminated without transmitting the document component 190a.

  FIG. 11 is a flowchart illustrating an example of a processing procedure when the user clicks the folder 200b in the information processing apparatus 11a. The document data management unit 70 monitors whether or not the folder 200b is clicked via the input unit 45 (step S301). When the shared folder 200b is clicked (YES in step S301), the hash value / integrated hash value request unit 71 provided in the document data management unit 70 functions, and the folder 200a, the document data 100a, The transmission of the hash value / integrated hash value of the document component 190a is requested (step S302). Thereafter, the data determination unit 72 functions to monitor whether or not a hash value / integrated hash value has been received from the document management apparatus 1 (step S303). If the hash value / integrated hash value is received (YES in step S303), the data discriminating unit 72 functions to temporarily store the received hash value / integrated hash value in the memory 42 (step S304). Data discrimination processing is performed (step S305). If it is determined in this data determination process that there is document data 100a having a different content from the document data 100b (YES in step S306), the document component request unit 73 functions and the document component specified in the data determination process is determined. The document management apparatus 1 is requested to transmit 190a (step S307). Then, the data update unit 74 functions and monitors whether or not the document component 190a is received from the document management apparatus 1 (step S308). When the document component 190a is received (YES in step S308), the content of the document component 190b stored in the document data storage unit 51 is rewritten to the content of the received document component 190a (step S309). Further, the hash value / integrated hash value stored in the hash value / integrated hash value storage unit 52 is rewritten to the hash value / integrated hash value temporarily stored in the memory 42 by the data determination unit 72 in step S304 (step S304). S310), the process is terminated. On the other hand, if it is determined in the data determination process in step S305 that there is no document data 100a having a different content from the document data 100b (NO in step S306), the document component and the hash value / integrated hash value are not updated. The process ends.

  FIG. 12 is a flowchart illustrating an example of a detailed processing procedure of the data determination process (step S305 in FIG. 11). First, the data determination unit 72 reads the hash value / integrated hash value of the folder 200a, the document data 100a, and the document component 190a stored in the memory 42, and further reads the folder 200b from the hash value / integrated hash value storage unit 52, The hash value / integrated hash value of the document data 100b and the document component 190b are read (step S401). The hash value / integrated hash value stored in the memory 42 is the one stored in step S304 in FIG. 11, and the hash value / integrated hash value stored in the hash value / integrated hash value storage unit 52 is The hash value / integrated hash value updated in step S310 of FIG. 11 is included. Next, the highest folder of the folder 200a and the highest folder of the 200b are specified (step S402), and the folder hash value of the highest folder of the folder 200a and the folder hash of the highest folder of the folder 200b are identified. The values are compared (step S403). If the folder hash values are equal (YES in step S404), the data discrimination process is terminated without doing anything. If the folder hash values are different (NO in step S404), the document data 100b stored in the folder 200b and the document data 100a stored in the folder 200a have different document hash values. Is determined (step S405). If it exists (YES in step S405), the document hash value is compared between the document data 100a and the document data 100b (step S406). If document data 100a and document data 100b having different document hash values exist (YES in step S407), the hash value of the document component 190a included in the document data 100a and the document component included in the document data 100b The hash value of 190b is compared (step S408). Then, the document component 190a having a hash value different from that of the document component 190b is specified (step S409), and it is determined whether or not a next lower folder exists (step S410). If there is no lower folder (NO in step S410), the data determination process is terminated. On the other hand, the document data 100a does not exist in the folder 200a (NO in step S405), or the document data exists in the folder (YES in step S405), but there is no document data having a different document hash value (step S407). No), or there is document data in the folder, and some of the document data have different document hash values, but if there is a lower folder (YES in step S410), A folder one level lower than the folder is specified (step S411), and the above-described process after step S403 is repeated again.

  13, FIG. 14, and FIG. 15 are diagrams for explaining the data determination processing in FIG. 12 by a specific example. In the illustrated example, the data storage structure of the document data storage unit 31 in the document management apparatus 1 includes a folder 220a of the highest folder, and the folder 220a includes document data 140a and 150a and a folder 210a that is a lower folder thereof. Stored. Document data 110a, 120a, and 130a are stored in the folder 210a. Further, in the information processing apparatus 11a, the document data storage unit 51 includes a folder 220b of the highest folder so as to correspond to the data holding structure of the document management apparatus 1, and the folder 220b includes document data 140b and 150b, A folder 210b, which is a lower folder, is stored. The folder 210b stores document data 110b, 120b, and 130b. 13, 14, and 15, the hash value and the integrated hash value corresponding to the data holding structure of the document management apparatus 1 are compared with the hash value and the integrated hash value corresponding to the data holding structure of the information processing apparatus 11 a. The case where it performs is illustrated.

  FIG. 13 is a diagram when the contents of the document data 110a and the contents of the document data 110b are different. In this example, the contents of the document body data 111a and the contents of the document body data 111b are different, and the contents of the security information 114a and the contents of the security information 114b are different. In this case, the hash value of the document body data 111a is different from the hash value of the document body data 111b. Also, the hash value of the security information 114a is different from the hash value of the security information 114b. For this reason, the document hash value of the document data 110a and the document hash value of the document data 110b are different, and the folder hash value of the folder 210a and the folder hash value of the folder 210b are different. As a result, the folder hash value of the folder 220a that is the highest folder is different from the folder hash value of the folder 220b.

  In this case, based on the data holding structure of the document management apparatus 1 and the information processing apparatus 11a in the data determination process, the folder hash value of the folder 220a, which is the highest folder, is compared with the folder hash value of the folder 220b. Since these folder hash values are different from each other, the comparison between the document hash values of the document data 140a and 150a and the document hash values of the document data 140b and 150b is performed individually. Since both are equal values, the lower folders 210a and 210b are specified, and the folder hash value of the folder 210a and the folder hash value of the folder 210b are compared. These folder hash values are different from each other. Therefore, next, the document hash values of the document data 110a, 120a, and 130a and the document hash values of the document data 110b, 120b, and 130b are individually compared. As a result, document data 110a and 110b having different document hash values are specified. Therefore, the hash values of the document constituent elements 111a, 112a, 113a, 114a constituting the document data 110a are compared with the hash values of the document constituent elements 111b, 112b, 113b, 114b constituting the document data 110b, and the document It can be specified that the two document constituent elements of the document main body data 111a and the security information 114a held in the management apparatus 1 have different contents from the document constituent elements held in the information processing apparatus 11a. .

  In this example, each of the document management apparatus 1 and the information processing apparatus 11a holds five document data composed of four document components. Therefore, the number of document components held by each of the document management apparatus 1 and the information processing apparatus 11a is 20. In this case, for example, if a conventional comparison process is performed, 20 comparison processes are required to specify all document components having different contents. On the other hand, according to the comparison process using the hash value and the integrated hash value as in the present embodiment, the folder 220a, document data 140a, document data 150a, folder 210a, document data 130a, document data 120a, document data 110a, the document body data 111a, the thumbnail 112a, the database 113a, and the hash value or integrated hash value of the security information 114a may be compared. Thus, the document management apparatus 1 and the information processing apparatus 11a are compared in a total of 11 comparison processes. It is possible to specify all the document components having different contents held in and.

  Next, FIG. 14 is a diagram in the case where the contents of the thumbnail 107 which is the document component of the document data 140a are different. In this example, the hash value of the thumbnail 107a and the hash value of the thumbnail 107b are different, and accordingly, the document hash value of the document data 140a and the document hash value of the document data 140b are also different.

  In this case, based on the data holding structure of the document management apparatus 1 and the information processing apparatus 11a in the data determination process, the folder hash value of the folder 220a, which is the highest folder, is compared with the folder hash value of the folder 220b. Since these folder hash values are different from each other, the comparison between the document hash values of the document data 140a and 150a and the document hash values of the document data 140b and 150b is performed individually. Then, the document hash value of the document data 140a is different from the document hash value of the document data 140b. Then, the hash values of the document constituent elements 106a, 107a, 108a, 109a constituting the document data 140a are compared with the hash values of the document constituent elements 106b, 107b, 108b, 109b constituting the document data 140b, and document management is performed. It can be specified that one document component of the thumbnail 107a held by the apparatus 1 has a different content from the document component held by the information processing apparatus 11a.

  In this example, the folder 220a, the document data 140a, the document data 150a, the folder 220a, the document body data 106a, the thumbnail 107a, the database 108a, and the security information 109a are compared by the comparison process using the hash value and the integrated hash value as described above. Since the comparison processing of the hash value or the integrated hash value may be performed, all document constituent elements having different contents held in the document management apparatus 1 and the information processing apparatus 11a can be specified by a total of eight comparison processes. Is possible.

  Next, FIG. 15 is a diagram when the contents of all the document data are equal. In this case, the hash value or integrated hash value of the folder, document data, and document constituent elements held in the document management apparatus 1 and the information processing apparatus 11a are all equal. In this example, when the folder hash value of the folder 220a and the folder hash value of the folder 220b are compared, the folder hash values are equal to each other, and therefore it is determined that there are no document components having different contents at that time. can do. Therefore, the number of comparison processes in this case is one, and the data determination process can be efficiently completed.

  As described above, in this embodiment, when it is determined whether or not the document management apparatus 1 and the information processing apparatus 11 hold document data having different contents, or when document components having different contents are specified. By using the hash value and the integrated hash value, discrimination and identification can be performed with a smaller number of comparisons than in the past. Therefore, it is possible to avoid a decrease in the performance of the document management system. Then, after such a comparison is performed, based on the comparison result, document components having different contents are transmitted from the document management device 1 to the information processing device 11, and the information processing device 11 updates the document components. In this case, the user can use the document data having the same content as the document data held by the document management apparatus 1 in the information processing apparatus 11.

(Modification)
As mentioned above, although several embodiment regarding this invention was described, this invention is not limited to the content mentioned above, A various modification is applicable. Some variations are given below.

  For example, in the above embodiment, as shown in FIG. 11 in particular, the information processing apparatus 11 makes a transmission request for the hash value and the integrated hash value to the document management apparatus 1 because the user selects a folder and clicks However, the present invention is not limited to this, and may be performed periodically, for example, or may be performed when the information processing apparatus 11 is turned on. Further, the operation is not limited to a folder click operation, and may be performed when, for example, a document data selection operation is performed. Other input operations may be used.

  In the above embodiment, the hash function for generating the hash value, the hash function for generating the document hash value, and the hash function for generating the folder hash value are exemplified as the same hash function. It is not limited.

  In the above embodiment, generation of the hash value and the integrated hash value is performed by the document management apparatus 1. However, the information processing apparatus 11 may perform the hash value and the integrated hash value, or the document management apparatus 1 and the information processing apparatus 11. Both of them may be performed.

  In the above-described embodiment, the case where the information processing apparatus 11 performs data determination processing for determining whether or not the document management apparatus 1 and the information processing apparatus 11 hold document data having different contents is illustrated. It is not something that can be done. For example, the data determination process (FIG. 12) described above may be performed by the document management apparatus 1. However, in this case, the document management apparatus 1 requests the information processing apparatus 11 to transmit the hash value and the integrated hash value, thereby obtaining the hash value and the integrated hash value corresponding to the data holding structure in the information processing apparatus 11 as information. It is necessary to obtain from the processing device 11.

  In the above-described embodiment, the case where both the hash value and the integrated hash value are collectively transmitted from the document management apparatus 1 to the information processing apparatus 11 when performing the data determination process is illustrated, but the present invention is not limited thereto. not. That is, first send the folder hash value corresponding to the top folder, and if the folder hash value is determined to be different, then the document hash value, the folder hash value of the lower folder, etc. are sent next, and integrated The hash value and the hash value may be transmitted step by step. In this case, there is an advantage that the traffic amount of the network 4 at the time of hash value transmission / reception can be reduced.

DESCRIPTION OF SYMBOLS 1 Document management apparatus 11 Information processing apparatus 20, 40 Control part 30 Storage apparatus (document data storage means)
50 Storage device (data storage means)
61 Hash value generator (digest data generator)
62. Integrated hash value generator (integrated digest data generator)
72 Data discrimination unit (data discrimination means)
100, 100a, 100b Document data 101 Document body data (document component)
102 Thumbnail (document component)
103 Database (document component)
104 Security information (document component)
190 Document component 200, 200a, 200b Folder (storage area, storage unit)

Claims (9)

Document data storage means for storing a plurality of document data in a predetermined storage unit, a plurality of document data stored in the storage unit by performing data communication with an information processing apparatus connected via a network, A document management apparatus that manages to maintain identity with a plurality of document data stored in a predetermined storage area in the information processing apparatus,
Generate document digest data corresponding to the contents of each document data stored in the storage unit, and based on the plurality of document digest data generated from each of the plurality of document data stored in the storage unit, Integrated digest data generation means for generating composite digest data corresponding to the contents of the document digest data;
It is generated by the integrated digest data generation means whether there are different contents between the plurality of document data stored in the storage unit and the plurality of document data stored in the predetermined storage area. Data discriminating means for judging by comparison of composite digest data;
A document management apparatus comprising: The data discrimination means includes
Among the plurality of document data stored in the storage unit, the one having contents different from the document data stored in the predetermined storage area is specified by comparing the document digest data generated by the integrated digest data generation unit. The document management apparatus according to claim 1. The document data stored in the storage unit is composed of a plurality of document components,
A digest data generating means for generating digest data corresponding to the contents of each document component;
The integrated digest data generation means includes:
The document digest data corresponding to the contents of each document data is generated based on a plurality of digest data generated from each of a plurality of document constituent elements constituting the document data stored in the storage unit. Item 3. The document management apparatus according to Item 1 or 2. The data discrimination means includes
Among the plurality of document constituent elements constituting the document data stored in the storage unit, those having different contents from the document constituent elements constituting the document data stored in the predetermined storage area are converted by the digest data generating means. 4. The document management apparatus according to claim 3, wherein the document management apparatus is specified by comparing the generated digest data. Document data storage means for storing a plurality of document data in a predetermined storage unit, a plurality of document data stored in the storage unit by performing data communication with an information processing apparatus connected via a network, A document management apparatus that manages to maintain identity with a plurality of document data stored in a predetermined storage area in the information processing apparatus,
Generate document digest data corresponding to the contents of each document data stored in the storage unit, and based on the plurality of document digest data generated from each of the plurality of document data stored in the storage unit, Integrated digest data generation means for generating composite digest data corresponding to the contents of the document digest data;
It is generated by the integrated digest data generation means whether there are different contents between the plurality of document data stored in the storage unit and the plurality of document data stored in the predetermined storage area. Data transmitting means for transmitting the combined digest data to the information processing apparatus to make a determination by comparing the combined digest data;
A document management apparatus comprising: An information processing apparatus connected to the document management apparatus according to claim 5 via a network so that data communication is possible,
Data storage means for storing a plurality of document data in a predetermined storage area;
Whether or not there is a document having different contents between a plurality of document data stored in a predetermined storage unit in the document management apparatus and a plurality of document data stored in the predetermined storage area. Data discriminating means for judging by comparing the composite digest data generated in the management device;
An information processing apparatus comprising: An information processing apparatus and a document management apparatus are connected to each other via a network so as to be able to perform data communication with each other, so that the identity of a plurality of document data held by the information processing apparatus and the document management apparatus is maintained. A document management system for managing
The document management apparatus includes:
Document data storage means for storing a plurality of document data in a predetermined storage unit;
Generate document digest data corresponding to the contents of each document data stored in the storage unit, and based on the plurality of document digest data generated from each of the plurality of document data stored in the storage unit, Integrated digest data generation means for generating composite digest data corresponding to the contents of the document digest data;
With
The information processing apparatus includes:
Data storage means for storing a plurality of document data in a predetermined storage area;
At least one of the document management device and the information processing device is:
The integrated digest data generation means generates whether or not there is a different content between the plurality of document data stored in the storage unit and the plurality of document data stored in the storage area. A document management system comprising data discriminating means for judging by comparing composite digest data. The storage unit is executed by a document management apparatus having a document data storage unit that stores a plurality of document data in a predetermined storage unit, and performs data communication with an information processing apparatus connected to the document management apparatus via a network. A document management program for maintaining the sameness between a plurality of document data stored in the information processing apparatus and a plurality of document data stored in a predetermined storage area in the information processing apparatus.
Generating document digest data corresponding to the contents of each document data stored in the storage unit;
Generating synthesized digest data corresponding to the contents of the plurality of document digest data based on a plurality of document digest data generated from each of the plurality of document data stored in the storage unit;
It is determined by comparing the composite digest data whether there are different contents between the plurality of document data stored in the storage unit and the plurality of document data stored in the predetermined storage area. And steps to
A document management program characterized by causing The storage unit is executed by a document management apparatus having a document data storage unit that stores a plurality of document data in a predetermined storage unit, and performs data communication with an information processing apparatus connected to the document management apparatus via a network. A document management program for maintaining the sameness between a plurality of document data stored in the information processing apparatus and a plurality of document data stored in a predetermined storage area in the information processing apparatus.
Generating document digest data corresponding to the contents of each document data stored in the storage unit;
Generating synthesized digest data corresponding to the contents of the plurality of document digest data based on a plurality of document digest data generated from each of the plurality of document data stored in the storage unit;
It is determined by comparing the composite digest data whether there are different contents between the plurality of document data stored in the storage unit and the plurality of document data stored in the predetermined storage area. To send the combined digest data to the information processing apparatus,
A document management program characterized by causing

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