JP2018067084A - Cooperative work system, editing management program and editing management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve performance of synchronization between terminals to appropriately resolve contention for operation.SOLUTION: In a cooperative work system in which a server which manages conference data including one or a plurality of objects and a plurality of terminals which receive and store the conference data from the server are connected over a communication network and the one or plurality of objects are browsed and edited by the plurality of terminals to perform cooperative work, each of the terminals transmits editing information indicative of contents of editing operation to the server and the other terminals when performing the editing operation on a prescribed object, and in response to receiving the editing information from the terminal, the server determines whether the editing operation on the prescribed object in the editing information is consistent with a state of the prescribed object in the conference data (editing does not conflict) or not and notifies each of the terminals of the determination result.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a collaborative work system, an edit management program, and an edit management method, and in particular, a collaborative work system that performs collaborative work using a plurality of terminals, an edit management program that manages editing in each terminal, and editing in the collaborative work system. It relates to the management method.

  There has been proposed a collaborative work system that realizes content sharing in a remote conference or the like by sharing and displaying data stored in a server simultaneously on a plurality of terminals so that the data can be edited together. In this collaborative work system, in order to smoothly advance collaborative work at a plurality of terminals, it is important that the contents operated by a certain terminal are transmitted to other terminals in real time. In particular, when you start editing on one device, if you start editing on another device at the same time, a conflict will occur, and the more delayed the operation reflected on the other device, the more likely this conflict will occur. Therefore, it is important to improve the performance of synchronization between terminals.

  With regard to such a collaborative work system, for example, Patent Document 1 below includes a plurality of clients and a server for use by a plurality of users, and supports collaborative work by a plurality of users of the plurality of clients. In the collaborative work support system, the server includes part information including attribute information of a predetermined target corresponding to a part to be displayed on a screen of the client of a user participating in the joint work, and address information regarding the target. Component information storage means for storing; and transmission means for transmitting the component information to the client of the user participating in the collaborative work, the client receiving means for receiving the component information; A collaborative work support system having display control means for displaying the part on the screen based on part information is disclosed. There.

  In addition, regarding a technique for improving performance in a system in which a plurality of terminals are connected via a network, the following Patent Document 2 discloses a combination of information processing apparatuses that are configured by a plurality of information processing apparatuses and can communicate with each other. An information processing apparatus that performs communication while transmitting and receiving information optimized in accordance with the transfer status at that time in a state in which can be connected and can perform information communication is disclosed.

  Further, in Patent Document 3 below, a network state measuring unit that measures a network state between the own terminal and another terminal, a processing performance measuring unit that measures the processing performance of the own terminal and other terminals, and a user's Based on the sampling interval of the operation event that occurs according to the operation, the data reduction rate calculating means that determines the optimal data reduction rate according to the measurement result of the network state and the processing performance, and the optimal data reduction rate, A data reduction means for reducing operation shared data to be transmitted to another terminal is disclosed.

  Regarding management of information in the server, Patent Document 4 below is an information server that can be connected to a plurality of information clients through a communication line, and includes storage means and processing means, and the storage means stores shared information storage. Means and client correspondence information storage means, wherein the shared information storage means stores shared information, and the processing means comprises client correspondence information generation means, shared information update means, and client correspondence information update means, The client correspondence information generating means duplicates the content of the shared information for each of the plurality of information clients in response to usage requests from the plurality of information clients, and stores the plurality of client correspondence information as the plurality of client correspondence information to the client correspondence information storage means. Recording and using the plurality of information clients to update the shared information Updating the shared information by reflecting the content of some or all of the client correspondence information out of the plurality of client correspondence information provided for use in the shared information, and updating the client correspondence information Discloses a configuration in which, when the shared information is updated, the content of the shared information is copied for each of the plurality of information clients, thereby updating the plurality of client correspondence information.

JP 2011-034491 A JP 2004-355303 A WO2013 / 073125 JP 2004-326176 A

  As in Patent Document 1, each terminal acquires and browses data from a server that stores data, and when editing is performed at any of the terminals, the editing information is transmitted to the server. Since the editing information is transmitted twice via the server in the system that transmits the editing information to each terminal, it takes time until the editing is reflected on the other terminals.

  In addition, a method of changing the data format at the time of transmission according to the communication situation (sent in a lighter format when the load is high) as in Patent Document 2, or a communication according to the network load as in Patent Document 3 Even if the method of thinning out the data to be used is adopted, it is not improved in terms of the occurrence of two communications from the operated terminal to the server and from the server to the other terminal, so the editing is reflected on the other terminal Can not be shortened effectively.

  Also, in Patent Document 4, the information server duplicates the content of the shared information for each information client to generate client correspondence information, the information client edits the client correspondence information, and the information server has passed a certain time. Every time, the shared information is updated to reflect the content of the edited client correspondence information, and the client correspondence information is updated with the updated shared information content. Since the shared information and the client correspondence information are updated, the editing performed on the terminal is not immediately reflected, and the possibility of operation conflicts increases.

  In other words, in a conventional collaborative work system that realizes collaborative work between a plurality of terminals by sharing data via a server, there is a problem that synchronization performance between the terminals is poor and operation competition easily occurs.

  The present invention has been made in view of the above-mentioned problems, and its main purpose is to quickly and appropriately reflect editing performed on one terminal to other terminals in joint work between a plurality of terminals. The collaborative work system and the edit management can improve the performance of synchronization between terminals, suppress the occurrence of operation conflict, and appropriately resolve the operation conflict even when the operation conflict occurs. It is to provide a program and an editing management method.

  In one aspect of the present invention, a management device that manages conference data including one or more objects and a plurality of terminals that receive and store the conference data from the management device are connected via a communication network. A collaborative work system that collaborates by browsing and editing the one or more objects at the terminal, wherein each of the terminals accepts an operation by an operation unit, and an editing operation on the object has been performed. An operation determining unit that determines whether the editing operation has been performed on a predetermined object, and a communication control unit that transmits editing information indicating the content of the editing operation to the management device and another terminal. A processing unit that changes the state of the predetermined object based on the editing information when the editing information is received. A management unit that stores and manages the conference data in a storage unit, and when the editing information is received from the terminal, an editing operation on the predetermined object in the editing information is performed by the predetermined unit in the conference data. It is characterized by comprising: a determination unit that determines whether or not it matches the state of the object; and a notification unit that notifies the determination result of the determination unit to each of the terminals.

  In one aspect of the present invention, a management device that manages conference data including one or more objects and a plurality of terminals that receive and store the conference data from the management device are connected via a communication network. An editing management program that operates on the management device in a collaborative work system that performs collaborative work by browsing and editing the one or more objects at a terminal of the storage device, wherein the conference data is stored in the management device Management processing stored and managed, and when the editing information indicating the content of the editing operation on the predetermined object is received from the terminal, the editing operation on the predetermined object in the editing information is Determination processing for determining whether or not the state of the object matches, the determination result of the determination processing is Notification process of notifying the terminal, characterized in that to the execution.

  In one aspect of the present invention, a management device that manages conference data including one or more objects and a plurality of terminals that receive and store the conference data from the management device are connected via a communication network. An editing management method in a collaborative work system in which collaborative work is performed by browsing and editing the one or more objects at a terminal of each of the terminals, wherein each of the terminals accepts an operation by an operation unit and performs an editing operation on the object When it is determined that an editing operation has been performed on a predetermined object, the editing information indicating the content of the editing operation is transmitted to the management device and another terminal, and the editing information is transmitted. When received, the state of the predetermined object is changed based on the editing information, and the management device stores the conference data in a storage unit Storing and managing, and determining whether the editing operation for the predetermined object in the editing information is consistent with the state of the predetermined object in the conference data when the editing information is received from the terminal; The determination result is notified to each of the terminals.

  According to the collaborative work system, the edit management program, and the edit management method of the present invention, in a collaborative work between a plurality of terminals, the editing performed on a certain terminal can be quickly and appropriately reflected on the other terminals, Synchronization performance can be improved, operation conflicts can be suppressed, and operation conflicts can be appropriately resolved even when operation conflicts occur.

  The reason is that a server that manages conference data including one or more objects and a plurality of terminals that receive and store the conference data from the server are connected via a communication network, and one or more objects are connected to the plurality of terminals. In a collaborative work system in which collaborative work is performed by browsing and editing, when each terminal performs an edit operation on a predetermined object, the edit information indicating the content of the edit operation is transmitted between the server and other terminals. When the editing information is received from the terminal, the control unit (editing management program) of the server determines whether the editing operation for the predetermined object in the editing information is consistent with the state of the predetermined object in the conference data (editing). This is because each terminal is notified of the determination result.

It is a schematic diagram explaining operation | movement (at the time of a collaborative work start) of a collaborative work system. It is a schematic diagram explaining operation | movement (operation | movement at the time of editing with a terminal) of the conventional collaborative work system. It is a schematic diagram explaining operation | movement (operation | movement at the time of editing with a terminal) of the collaborative work system which concerns on one embodiment of this invention. It is a schematic diagram explaining operation | movement (operation | movement at the time of the matching judgment in a server) of the collaborative work system which concerns on one embodiment of this invention. It is a schematic diagram which shows the structure of the collaborative work system which concerns on 1st Example of this invention. It is a block diagram which shows the structure of the client terminal which concerns on 1st Example of this invention. It is a block diagram which shows the structure of the server which concerns on 1st Example of this invention. It is a flowchart figure which shows an example of operation | movement of the collaborative work system which concerns on 1st Example of this invention. It is an example of the edit information which concerns on 1st Example of this invention. It is a flowchart figure which shows an example of operation | movement (contradiction elimination process) of the client terminal which concerns on 1st Example of this invention. It is a flowchart figure which shows the other example of operation | movement (contradiction elimination process) of the client terminal which concerns on 1st Example of this invention. It is a flowchart figure which shows the other example of operation | movement of the collaborative work system which concerns on 1st Example of this invention. It is a schematic diagram which shows an example of the edit control which concerns on 1st Example of this invention. It is a schematic diagram which shows the other example of edit control which concerns on 1st Example of this invention. It is a schematic diagram which shows the structure of the collaborative work system which concerns on 2nd Example of this invention. It is a block diagram which shows the structure of the client terminal which concerns on 2nd Example of this invention.

  As shown in the background art, in a collaborative work system that allows data stored on a server to be shared and displayed simultaneously on multiple terminals and edited together, make sure that editing operations on multiple terminals do not compete Therefore, it is important to improve the performance of synchronization between terminals.

  However, as in Patent Document 1, in a method in which a terminal that has performed editing transmits editing information to the server and the editing information is transmitted from the server to each terminal, the editing information must be transmitted twice. It takes time to be reflected. Further, even if the data format at the time of transmission is changed according to the communication status as in Patent Document 2 or data to be communicated is thinned out according to the network load as in Patent Document 3, 2 between the terminal and the server. Since communication is required once, the time until the editing is reflected cannot be efficiently reduced.

  In addition, when the server manages information, there is a method in which the server collects information at regular intervals and updates data as in Patent Document 4, but in this method, editing performed on the terminal is reflected immediately. This increases the possibility of operation conflicts. For example, when a certain object is deleted at the terminal A and the same object is moved at the terminal B immediately after that, the movement by the terminal B becomes a movement for an object not on the screen, so the operation of the terminal B becomes invalid.

  Thus, in joint work between a plurality of terminals, it is necessary to improve the performance of synchronization between terminals and suppress the occurrence of operation conflicts.In one embodiment of the present invention, first, When editing on any device, the editing information is sent directly from the editing device to other synchronized devices, rather than being sent to the other device via the server. In this way, the edited content can be reflected on other terminals in one communication.

  Furthermore, even if an operation conflict occurs, the server compares the stored data with the received editing information in order to properly resolve the operation conflict. Whether the editing operation for the object to be edited in the information is consistent with the state of the object in the stored data (for example, the state of the object before the editing operation is the latest state of the object in the stored data Whether they match, that is, whether the edits are consistent. If the editing operation is consistent (editing is not inconsistent), the stored data is updated. If the editing operation is not consistent (editing is inconsistent), the server or terminal resolves the inconsistency.

  Specifically, at the start of the conference, the server distributes the stored data to each terminal. Then, when editing information is received from the terminal during the conference, it is checked whether the editing is consistent. If there is no contradiction in editing, the data stored based on the editing information is updated (the state of the object to be edited is changed), and the updated data and the state are notified to each terminal. When editing contradicts, each terminal is instructed to resolve the contradiction without updating the stored data.

  Each terminal downloads data from the server and saves it at the time of conference participation (including midway participation). Also, during a meeting, an editing operation by a user is accepted, editing information is transmitted to another terminal and a server, and the terminal that receives the editing information changes the state of the object to be edited. When the updated data is received from the server, the stored data is overwritten with the data received from the server. Further, when a notification that the state has been changed is not received from the server within a predetermined time, or when a notification instructing resolution of the contradiction is received, the contradiction is resolved by canceling the editing operation.

  The basic operation of the conventional and the collaborative work system of the present invention will be outlined below with reference to FIGS. Here, it is assumed that joint work is performed using two terminals (terminal A and terminal B) and a server. Also, documents, images, handwritten information, etc. displayed on the display unit of the terminal during collaboration work are called objects, information for specifying one or more objects (such as object IDs), and before and after editing operations on the objects Data of collaborative work including information (display position, display size, etc.) specifying the state of the object is called conference data. In addition, when changing the state of one or more objects in the conference data, the editing information includes information for specifying an object to be edited, information for specifying an editing operation performed on the object, and information on the editing operation. Contains information that identifies the state of the object before and after. When an object is added, the editing information includes object data.

[When collaborative work starts]
As shown in FIG. 1, the terminal A and the terminal B acquire the conference data from the server at the start of the collaborative work (see (1) in the figure), and create a copy of the conference data in the storage unit of the terminal. Each object is displayed on the display unit 17 based on the conference data (see (2) in the figure).

[When editing on a conventional terminal A]
Conventionally, as shown in FIG. 2, when the user edits an object by operating the operation unit of the terminal A (see (1) in the figure), the terminal A displays the edited content on the display unit. At the same time, the editing information is transmitted to the server (see (3) in the figure). When the server receives the edit information from terminal A, the server transmits the received edit information to another terminal (here, terminal B) (see (4) in the figure). Then, the terminal B updates the display of the display unit 17 based on the editing information received from the server to reflect the editing content (see (5) in the figure). That is, in the conventional method, editing contents cannot be reflected on terminal B unless two communications are performed from terminal A to the server and from the server to terminal B.

[When editing on the terminal A of the present invention]
In the present invention, as shown in FIG. 3, when the user edits an object by operating the operation unit of terminal A (see (1) in the figure), terminal A displays the edited content on the display unit. The editing information is transmitted to both the server and the other terminal (terminal B) (see (3) in the figure). Then, terminal B updates the display on the display unit based on the editing information received from terminal A to reflect the editing content (see (4) in the figure). Thus, according to the present invention, the performance of synchronization between terminals can be improved by directly transmitting editing information from the editing terminal to another terminal.

[When judging by the server of the present invention]
Further, in the present invention, as shown in FIG. 4, when the server receives the editing information from the terminal A, the server checks whether there is any contradiction between the stored conference data and the received editing information ((1) in the figure). reference). If there is no contradiction, the server reflects the operation information in the stored conference data. On the other hand, if there is a contradiction, the server transmits a contradiction resolution request to each terminal (see (2) in the figure), and each terminal resolves the contradiction according to the received resolution request (see FIG. (See (3) in the middle). For example, the editing operation for the object is canceled.

  In this way, in the collaborative work system of the present invention, each terminal directly transmits editing information not only to the server but also to other terminals, thereby improving the synchronization performance between the terminals and causing operation conflicts. Can be suppressed. In addition, there is a possibility that contradiction occurs when editing performed individually on a plurality of terminals is integrated, and when a contradiction occurs, the object becomes different between the server and each terminal. The server checks whether there is a contradiction between the stored conference data and the received operation information, and if a conflict is found, resolves the contradiction and aligns the object state between the server and each terminal. Even if an operation conflict occurs, the operation conflict can be appropriately resolved.

  In order to describe the above-described embodiment of the present invention in more detail, the collaborative work system, edit management program, and edit management method according to the first embodiment of the present invention will be described with reference to FIGS. To do. FIG. 5 is a schematic diagram showing the configuration of the collaborative work system of the present embodiment, FIG. 6 is a block diagram showing the configuration of the client terminal, and FIG. 7 is a block diagram showing the configuration of the server. 8 and 12 are flowcharts showing the operation of the collaborative work system of this embodiment, and FIG. 9 is an example of editing information of this embodiment. FIGS. 10 and 11 are flowcharts showing the operation of the client terminal according to the present embodiment. FIGS. 13 and 14 are schematic diagrams showing an example of editing control according to the present embodiment.

  As shown in FIG. 5A, the collaborative work system of the present embodiment includes a plurality of client terminals 10 used by users who perform collaborative work such as a remote conference, and a server 20 that manages conference data used for the collaborative work. And. These are connected via a network such as a LAN (Local Area Network) or a WAN (Wide Area Network) defined by standards such as Ethernet (registered trademark), Token Ring, and FDDI (Fiber-Distributed Data Interface).

  FIG. 5A shows a case where the plurality of client terminals 10 and the server 20 are connected to the same communication network. However, as shown in FIG. The configuration of the communication network can be set as appropriate, such as being connected to a workplace intranet and the server 20 being connected to the Internet. Hereinafter, each device will be described in detail.

[Client terminal]
The client terminal 10 is a computer terminal such as a personal computer, a portable terminal such as a tablet terminal or a smartphone, and the control unit 11, the storage unit 15, the communication I / F unit 16, and the display as shown in FIG. The unit 17 and the operation unit 18 are configured.

  The control unit 11 includes a CPU (Central Processing Unit) 12 configured by a microprocessor and the like, and a memory such as a ROM (Read Only Memory) 13 and a RAM (Random Access Memory) 14. The operation of the entire client terminal 10 is controlled by calling up a control program from the storage unit 15 and expanding and executing it in the RAM 14. As shown in FIG. 6B, the control unit 11 also functions as an operation determination unit 11a, a processing unit 11b, a communication control unit 11c, and the like.

  Based on the operation signal output from the operation unit 18, the operation determination unit 11 a determines whether collaborative work has been started or an editing operation has been performed on the object. Further, the operation determining unit 11a does not accept the next editing operation by the operation unit 18 until the cancellation of the editing operation by the processing unit 11b is completed, or accepts an instruction from the server 20 to prohibit the acceptance of the editing operation. Then, the next editing operation by the operation unit 18 is not accepted.

  The processing unit 11b of the client terminal 10 on which the editing operation has been performed changes the state of the object (display position and display size) based on the editing operation. When the processing unit 11b of another client terminal 10 receives editing information from the client terminal 10 on which the editing operation has been performed, the processing unit 11b changes the state of the object based on the editing information. Further, when receiving the conference data updated based on the editing information from the server 20, the processing unit 11b updates the conference data stored in the storage unit 15 or the like to the received conference data (the storage unit 15). Overwrite the meeting data stored in the received meeting data). Further, when the processing unit 11b receives a notification from the server 20 instructing the resolution of the contradiction, the processing unit 11b resolves the contradiction by canceling the editing operation or the like. If the processing unit 11b does not receive a notification from the server 20 that the state of the object has been changed (updates the conference data) within a predetermined time after changing the state of the object, the processing unit 11b Undo changes (ie, edit operations).

  In addition, when canceling the editing operation, the processing unit 11b cancels the editing operation, if there is an editing operation (second editing operation) after the editing operation (first editing operation). When canceling the operation or canceling the first editing operation, if the parameter changed in the first editing operation is also changed in the second editing operation, the parameter in the first editing operation is not changed. If the state of the object before editing in the second editing information is changed to the state of the object before editing in the first editing information, or the editing operation at a certain point is canceled, the subsequent editing The operation is reflected again. In addition, when the processing unit 11b receives a notification from the server 20 that the editing operation is not consistent, the processing unit 11b confirms with the user whether or not the editing operation is to be reflected. To make the server 20 modify the meeting data, or create a copy (duplicate) of the original object and apply the editing operation to the copied object.

  Further, the processing unit 11b sets the data size of the editing information to be transmitted to the other client terminals 10 according to the configuration and specifications of the other client terminals 10 (hereinafter collectively referred to as characteristics) as necessary. Reduce. For example, the resolution of the display unit 17 of the own terminal is compared with the resolution of the display unit 17 of the other client terminal 10, and if the resolution of the other client terminal 10 is lower, the editing information (object Data).

  The communication control unit 11c receives the conference data from the server 20 at the start of the collaborative work, and causes the display unit 17 to display a screen based on the conference data. Further, when the operation determination unit 11a determines that the object has been edited, the communication control unit 11c connects the editing information (editing information whose processing unit 11b has reduced the data size as necessary) to the communication network. The change is transmitted to the other client terminals 10 and the server 20 that have been notified, and the change of the object state is notified. As described above, the edit information is used when the state (display position, display size, etc.) of one or more objects in the conference data is changed (that is, when the object is moved or enlarged / reduced). For example, information for identifying an object (object ID), information for identifying an editing operation performed on the object, and the state of the object before and after the editing operation (display position in the case of object movement, enlargement / reduction of the object) In this case, the display position and the display size) and the time when the editing operation is performed as necessary are included. When adding an object (for example, handwriting input, text input, or image pasting), the editing information includes object data (handwritten data, text data, pasted image data). .

  The operation determination unit 11a, the processing unit 11b, and the communication control unit 11c may be configured as hardware, or software (edit) that causes the control unit 11 to function as the operation determination unit 11a, the processing unit 11b, and the communication control unit 11c. Control program), and the CPU 12 may execute the editing control program.

  The storage unit 15 includes a memory, an HDD (Hard Disk Drive), an SSD (Solid State Drive), and the like. The storage unit 15 stores conference data received from the server 20, editing information to be transmitted to other client terminals 10 and the server 20, and editing operations. Edit information received from the client terminal 10 performed, address information on the communication network of the other client terminals 10 and the server 20, and the like are stored.

  The communication I / F unit 16 includes a NIC (Network Interface Card), a modem, and the like, and establishes communication with other client terminals 10 and the server 20 connected via a communication network.

  The display unit 17 includes an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, and the like, and displays objects based on the screen based on the conference data received from the server 20 and the editing information received from other client terminals 10. Display the edited screen.

  The operation unit 18 includes a mouse, a keyboard, a touch sensor including grid-like electrodes arranged on the display unit 17, and the like, such as object movement, enlargement / reduction, handwriting input, text input, and image pasting. The editing operation is accepted, and an editing signal corresponding to the content of the editing operation is output to the operation determination unit 11a.

[server]
The server 20 is a management device such as a computer device. As shown in FIG. 7A, the control unit 21, the storage unit 25, the communication I / F unit 26, and a display unit and an operation unit, as necessary. Consists of.

  The control unit 21 includes a CPU 22 configured by a microprocessor and the like, and a memory such as a ROM 23 and a RAM 24. The CPU 22 calls a control program from the ROM 23 and the storage unit 25, expands it in the RAM 24, and executes it. The operation of the entire server 20 is controlled. As shown in FIG. 7B, the control unit 21 also functions as a management unit 21a, a determination unit 21b, a notification unit 21c, a communication control unit 21d, and the like.

  When the management unit 21a stores and manages the conference data to be transmitted to the client terminal 10 at the start of the collaborative work in the storage unit 25 or the like, and receives editing information from the client terminal 10, the management unit 21a follows the determination result of the determination unit 21b. Based on the editing information, the conference data is updated (the content of the editing information is reflected in the conference data and the state of the object to be edited is changed). Further, when receiving an instruction from the client terminal 10 to apply contradictory editing, the management unit 21a applies the editing operation to correct the conference data.

  When receiving the editing information from the client terminal 10, the determination unit 21 b compares the conference data stored in the storage unit 25 and the editing information received from the client terminal 10 to determine whether editing is inconsistent. To do. Specifically, whether the editing operation for the object in the editing information matches the state (display position and display size) of the object to be edited in the saved conference data, for example, the state of the object before the editing operation Determines whether it matches the latest state of the object in the stored conference data. If the object state matches, it is determined that the editing operation is consistent (the editing is consistent), and if the object state does not match (the object has already been moved to another position before the editing operation) If it is deleted), it is determined that the editing operation is not consistent (editing is inconsistent), and the determination result is transferred to the management unit 21a and the notification unit 21c.

  The notification unit 21c notifies each client terminal 10 of the determination result of the determination unit 21b. Specifically, when the determination unit 21b determines that the editing is consistent, the conference data updated based on the editing information is notified to each client terminal 10, or the state of the object is changed (based on the editing information). The client terminal 10 is notified that the conference data has been updated). On the other hand, when the determination unit 21b determines that the editing is contradictory, the client terminal 10 is notified of an instruction to resolve the contradiction. In addition, when the notification unit 21c determines that the editing is inconsistent, the notification unit 21c notifies the client terminal 10 of an instruction for prohibiting acceptance of the editing operation, or the editing is inconsistent with the client terminal 10 that has performed the editing operation ( The editing operation is not consistent).

  The communication control unit 21d transmits conference data to the client terminal 10 in accordance with an instruction from the management unit 21a, notifies the client that the state has been changed or an instruction to resolve the contradiction, or receives editing information from the client terminal 10. To do.

  The management unit 21a, the determination unit 21b, the notification unit 21c, and the communication control unit 21d may be configured as hardware, or the control unit 21 may be configured as the management unit 21a, the determination unit 21b, the notification unit 21c, and the communication control unit 21d. The software may be configured as software (edit management program) that functions as the CPU 22 and the CPU 22 may execute the edit management program.

  The storage unit 25 includes a memory, an HDD, an SSD, and the like, and stores conference data, editing information received from the client terminal 10, address information of the client terminal 10 connected to the communication network, and the like.

  The communication I / F unit 26 includes a NIC, a modem, and the like, and establishes communication with the client terminal 10 connected via a communication network.

  5 to 7 are examples of the collaborative work system of the present embodiment, and the configuration and control contents can be changed as appropriate. For example, although a plurality of client terminals 10 are handled equally in the above, the server 20 may change the control for each client terminal 10.

  Hereinafter, the operation of the collaborative work system configured as described above will be specifically described. Each client terminal 10 accesses the server 20 via the communication I / F unit 26, and information on other client terminals 10 that collaborate with the conference data from the server 20 (address information on the communication network, display unit). 17 resolution information) is stored in the storage unit 15 or the like, and the display unit 17 displays a screen (referred to as a work screen) for performing collaborative work on one or more objects included in the conference data. Suppose that

  The CPU 22 of the server 20 executes the process of each step of the server 20 shown in the flowchart of FIG. 8 by expanding and executing the editing management program stored in the ROM 23 or the storage unit 25 on the RAM 24. Further, the CPU 12 of the client terminal 10 expands and executes the editing control program stored in the ROM 13 or the storage unit 15 in the RAM 14, thereby executing the processing of each step of the client terminal 10 shown in the flowchart of FIG. The process of each step shown in the flowchart of FIG. 11 is executed.

  As illustrated in FIG. 8, the control unit 11 (operation determination unit 11 a) of the client terminal 10 (client terminal 10 that executes the operation) determines whether the object has been operated based on the operation signal output from the operation unit 18. If it is determined and an editing operation (for example, movement of the object) is performed (S101), the state of the object is changed based on the editing operation (S102). And the control part 11 (processing part 11b) compares the resolution of the display part 17 of an own terminal with the resolution of the display part 17 of the other client terminal 10 as needed, and the resolution of the other client terminal 10 is set. If it is lower, processing such as compressing the object data is performed, and then the control unit 11 (communication control unit 11c) sends editing information to the server 20 and other client terminals 10 to notify the change of the object state. (S103).

  The editing information is composed of information necessary for transmitting a change in the state of the object by the editing operation. FIG. 9 shows an example of editing information when an object is moved as an editing operation. The editing information includes information for specifying the editing operation (operation contents), an object ID to be edited, and a state before the editing operation (change). It consists of the previous state (here, the center coordinates of the object), the state after the editing operation (the state after the change, here the center coordinates of the object), and the time when the editing operation was performed as necessary. In this way, by including not only the operation content and the changed state but also the state before the change in the editing information transmitted from the client terminal 10, when canceling the editing operation, the previous state is determined from the past history. There is no need to search, and the contradiction resolution process described later can be performed with a small number of processes.

  Returning to FIG. 8, when the control unit 11 (communication control unit 11 c) of the other client terminal 10 receives the editing information from the client terminal 10 that executes the operation (S 104), the object is based on the received editing information. Is changed (S105).

  Further, when the control unit 21 (communication control unit 21d) of the server 20 receives the editing information from the client terminal 10 that executes the operation (S106), the control unit 21 (determination unit 21b) stores it in the storage unit 25 or the like. The conference data being processed is compared with the received editing information, and it is determined whether the editing conflicts (S107). If it is determined that the edits are consistent, the control unit 21 (management unit 21a) changes the state of the object (updates the conference data) based on the received editing information (S108). On the other hand, when it is determined that the edits are contradictory, the control unit 21 (notification unit 21c) notifies all the client terminals 10 (the client terminal 10 that executes the operation and the other client terminals 10) an instruction to resolve the contradiction. (S109).

  When the control unit 11 (communication control unit 11c) of all the client terminals 10 receives the notification instructing the resolution of the contradiction from the server 20 (S110), it executes the conflict resolution process (cancellation of the editing operation) (S111). . When the control unit 21 (management unit 21a) of the server 20 updates the conference data, the control unit 21 (communication control unit 21d) transmits the updated conference data to each client terminal 10, and the control unit of each client terminal 10 11 (processing unit 11b) may update the conference data stored in the storage unit 15 or the like to the received conference data.

  As described above, the client terminal 10 that executes the editing operation directly transmits the editing information not only to the server 20 but also to the other client terminals 10, so that the synchronization performance between the client terminals 10 is improved, and the operation conflict Occurrence can be suppressed. In addition, when the editing information is received, the server 20 determines whether the editing is inconsistent. If the editing is determined to be inconsistent, the server 20 notifies the client terminal 10 of an instruction to resolve the contradiction, and the client terminal 10 follows the instruction. Since the conflict resolution process (cancellation of the editing operation) is performed, the operation conflict can be appropriately resolved even when the operation conflict occurs.

  Here, when performing the process of resolving the contradiction (cancellation of the editing operation), there is a possibility that the editing operation has been performed on the object to be edited after that, in that case, after the corresponding editing operation You may cancel the editing operation that is being performed, but if the parameter (for example, position) to be canceled has been changed in the editing operation that has been performed since the corresponding editing operation, The parameter may not be canceled (overwritten to the state before the editing operation). For example, when object 1 is moved from (0,0) to (50,0) by editing operation 1, and object 1 is moved from (50,0) to (100,0) by the next editing operation 2. When canceling the editing operation 1, the parameter (position) of the editing operation 1 is not changed (the state (0, 0) before the editing operation is not overwritten). FIG. 10 shows the details of the processing in that case. First, the control unit 11 (processing unit 11b) changes each parameter to be changed in order to eliminate the contradiction by the subsequent editing operation. (S201), if the parameter has not been changed, the parameter is changed (S203), and the contradiction resolution process is terminated.

  Further, when an editing operation at a certain time point is canceled, an editing operation performed after the editing operation may be reflected again. For example, when processing is performed on an object in the order of editing operations 1, 2, 3, and 4, when editing operation 2 is canceled, editing operation 2 is canceled and the object is returned to the state after editing operation 1. Later, the editing operations 3 and 4 can be applied again (the state after the editing operations 3 and 4 are performed). FIG. 11 shows details of the processing. First, the control unit 11 (processing unit 11b) cancels the editing operation in order to eliminate the contradiction (S301), and thereafter, the processing is performed after the editing operation. The editing operation is reflected again (S302), and the contradiction resolution process is terminated.

  When it is determined in S202 of FIG. 10 that there is a change, the parameter is not changed, but there is no editing operation, so the “pre-change state” of the subsequent editing operation changes. In order to cope with this, when the editing information transmitted from the client terminal 10 includes not only the operation content and the result (the state after the change) but also the state before the change, in the case of “with change” in the above flow For a parameter that has not been changed, the “state before change” of the edit operation to be canceled may be overwritten on the “state before change” of the edit operation for changing the parameter next time.

  For example, when object 1 is moved from (0,0) to (50,0) by editing operation 1, and object 1 is moved from (50,0) to (100,0) by the next editing operation 2. In addition, since the coordinates of the object 1 are also changed by the editing operation 2, the parameter (position) is not changed by canceling the editing operation 1, and the editing operation 2 starts from the coordinates (50, 0) of the object 1 to (100, The editing operation moves to 0). Thereafter, when the editing operation 2 is also canceled, the object 1 is returned to (50, 0), and as a result, the editing operation 1 is applied. In order to prevent this, when canceling the editing operation 1, the state before the editing operation 2 is overwritten with the state before the editing operation 1 is changed. That is, the editing operation 2 moves from the editing operation of moving the object 1 from the coordinates (50, 0) to (100, 0), and the editing operation of moving the object 1 from the coordinates (0, 0) to (100, 0). Rewrite to In this way, when the editing operation 2 is canceled, the object 1 returns to (0, 0), so that the editing operation can be canceled correctly.

  In FIG. 8, when the editing is determined to be contradictory, the server 20 notifies the client terminal 10 of an instruction for eliminating the contradiction. However, when the editing is determined to be consistent, the server 20 notifies the client terminal 10. The notification that the status has been updated may be notified, and the editing operation may be canceled when each client terminal 10 does not receive the notification within a predetermined time.

  FIG. 12 is a flowchart showing the operation of the collaborative work system in this case, and the control unit 11 (operation determination unit 11a) of the client terminal 10 (client terminal 10 that executes the operation) operates in the same manner as in FIG. Based on the operation signal output from the unit 18, it is determined whether or not the object has been operated. When the editing operation is performed (S401), the state of the object is changed based on the editing operation (S402). Then, the control unit 11 (processing unit 11b) performs processing such as compressing the data of the object as necessary, and then the control unit 11 (communication control unit 11c) transmits to the server 20 and other client terminals 10. The editing information is transmitted to notify the change of the object state (S403).

  When the control unit 11 (communication control unit 11c) of the other client terminal 10 receives the editing information from the client terminal 10 that executes the operation (S404), similarly to FIG. 8, the object is based on the received editing information. Is changed (S405).

  When the control unit 21 (communication control unit 21d) of the server 20 receives the editing information from the client terminal 10 that executes the operation (S406), as in FIG. 8, the control unit 21 (determination unit 21b) The conference data stored in the storage unit 25 or the like is compared with the received editing information to determine whether editing is inconsistent (S407). Here, in FIG. 8, when it is determined that the editing is contradictory, the server 20 notifies the client terminal 10 of an instruction to resolve the contradiction. However, in FIG. 12, when it is determined that the editing is contradictory, the control unit 21 ( When the management unit 21a) does not change the state of the object (updates the conference data) and determines that the editing is consistent, the control unit 21 (management unit 21a) determines the object's state based on the received editing information. The state is changed (conference data is updated) (S408), and the control unit 21 (notification unit 21c) changes the object state to all the client terminals 10 (the client terminal 10 that executes the operation and the other client terminals 10). The change is notified (S409).

  Whether the control unit 11 (communication control unit 11c) of all the client terminals 10 has received a notification from the server 20 that the object state has been changed within a predetermined time after changing the object state. If it is determined (S410) and a notification is received within a predetermined time, nothing is done (that is, the change of the object state is maintained), and if the notification is not received within the predetermined time, the object state is changed. Cancel (cancel edit operations on an object).

  As described above, when the server 20 receives the editing information, the server 20 determines whether the editing is inconsistent. If the server 20 determines that the editing is not inconsistent, the server 20 notifies the client terminal 10 that the state of the object has been changed. If a notification indicating that the object state has been changed is not received from the server 20 within a predetermined time after the object state has been changed, the editing operation is canceled to prevent an operation conflict. Can do.

  Here, if a new editing operation is performed while the process of eliminating the contradiction in editing (S111 in FIG. 8 and S411 in FIG. 12) is performed, the editing operation may cause further contradiction. There is sex. Therefore, the control unit 11 (operation determination unit 11a) of the client terminal 10 does not accept a new editing operation while the control unit 11 (processing unit 11b) is performing processing for eliminating the contradiction of editing. Also good. By performing such control, it is possible to prevent inconvenience that a more contradictory editing operation is performed while the contradiction of editing is resolved.

  Further, there may be a case where each client terminal 10 further performs an editing operation after the editing information is transmitted to the server 20 and before the editing contradiction is confirmed. In this case, as shown in FIG. 8 and FIG. 12, in the method of checking and resolving editing contradiction for each editing operation, there is a possibility that the flow may be terminated in a state where editing contradiction remains. In order to prevent this, when the server 20 determines that the editing is inconsistent, the server 20 once instructs the prohibition of the editing operation of all the client terminals 10 and there is no contradiction in the editing operation after the editing operation in which the contradiction occurs. If there is a contradiction, the client terminal 10 may be notified of an instruction to resolve the contradiction including the resolution of the contradiction. By performing such control, even if contradiction further occurs in subsequent editing operations by eliminating the contradiction, they can be eliminated at a time.

  If it is determined that the editing is inconsistent, the conflict is resolved because the editing is inconsistent with the client terminal 10 (or the user of the client terminal 10) who performed the editing operation ( It may be notified that the editing operation has been canceled. In addition, when it is determined that the editing is inconsistent, the editing operation is not canceled unintentionally, but whether or not the contradiction is resolved and how to resolve the contradiction are confirmed with the user. good. Thereby, the user can recognize that his editing operation has been canceled.

  Also, when editing is inconsistent, the user is confirmed whether or not to apply the contradictory editing operation, and when the application is instructed, the conference data of the server 20 can be applied to the editing operation. You may correct it. In addition, when instructed to apply conflicting editing operations, a copy may be created, and one editing operation may be applied to the copy to reflect both editing operations. This control will be specifically described with reference to FIGS. 13 and 14.

  FIG. 13 shows a case where an editing operation for deleting the object 31 and an editing operation for moving the object 31 conflict. Specifically, as shown in FIG. 13A, when the object 31 is displayed on the work screen 30 of the display unit 17 of the client terminal 10, as shown in FIG. FIG. 13 shows a case where the operation 1 for deleting the object 31 is performed, and then the operation 2 for moving the object 31 is performed by the client B as shown in FIG.

  In this case, when the server 20 determines that the editing is contradictory, the operation 2 is canceled and the operation 1 is applied (the object 1 is deleted) as shown in FIG. When the application of the operation 2 is instructed, the operation 1 can be canceled and the operation 2 can be applied as shown in FIG. In that case, the server 20 easily corrects the conference data so that the operation 2 can be applied (changes the operation data to a state where the operation 2 is applied after the operation 1 is canceled), even after the editing operation is canceled. You can reflect or execute your own editing operations.

  FIG. 14 shows a case where an editing operation for moving the object 31 to a certain position competes with an editing operation for moving the object 31 to another position. Specifically, as shown in FIG. 14A, when the object 31 is displayed on the work screen 30 of the display unit 17 of the client terminal 10, as shown in FIG. 14 shows a case where the operation 1 for moving the object 31 to the first position is performed, and then the client B performs the operation 2 for moving the object 31 to the second position, as shown in FIG. 14C. .

  In this case, when the server 20 determines that the editing is contradictory, the operation 2 is canceled and the operation 1 is applied (the object 31 is moved to the first position) as shown in FIG. However, as shown in FIG. 14E, by creating a copy (duplication) of the object 31 and applying operation 2 to the copy, a new editing operation can be performed without canceling the editing operation of another user. Can be applied as

  Next, a collaborative work system, an edit management program, and an edit management method according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 15 is a schematic diagram showing the configuration of the collaborative work system of this embodiment, and FIG. 16 is a block diagram showing the configuration of the client terminal.

  In the above embodiment, the collaborative work system is configured by the plurality of client terminals 10 and the server 20. However, as shown in FIG. 15, when any one of the client terminals 10 has a function as the server 20, The server 20 can be omitted.

  In this case, the control unit 11 of the client terminal 10 functioning as the server 20 includes a management unit 11d, a determination unit, in addition to the operation determination unit 11a, the processing unit 11b, and the communication control unit 11c, as illustrated in FIG. 11e and also functions as a notification unit 11f.

  The management unit 11d stores and manages the conference data to be transmitted to the client terminal 10 at the start of the collaborative work in the storage unit 15 or the like, and receives the editing information from the client terminal 10 on which the editing operation has been performed, According to the determination result of 11e, the conference data is updated based on the editing information (the content of the editing information is reflected in the conference data). When the management unit 11d receives an instruction to apply contradictory editing from the client terminal 10 on which the editing operation has been performed, the management unit 11d applies the editing operation to correct the conference data.

  The determination unit 11e compares the conference data stored in the storage unit 15 or the like with the editing information received from the client terminal 10 on which the editing operation has been performed, and determines whether editing is inconsistent.

  When the determination unit 11e determines that the editing is consistent, the notification unit 11f notifies the other client terminals 10 of the conference data updated based on the editing information, or changes the object state (to the editing information). The other client terminal 10 is notified that the conference data has been updated based on this. On the other hand, when the determination unit 11e determines that the editing is contradictory, the other client terminal 10 is notified of an instruction to resolve the contradiction. In addition, when the notification unit 11f determines that the editing is contradictory, the notifying unit 11f notifies the other client terminal 10 of an instruction to prohibit the reception of the editing operation, or the editing is inconsistent to the client terminal 10 that has performed the editing operation. Notification (edit operation is not consistent).

  Then, the client terminal 10 including the operation determination unit 11a, the processing unit 11b, the communication control unit 11c, the management unit 11d, the determination unit 11e, and the notification unit 11f is operated as the server 20 of the first embodiment, and FIGS. The process shown in is executed.

  As described above, when receiving the editing information, the client terminal 10 functioning as a server determines whether the editing is inconsistent, and if it is determined that the editing is inconsistent, notifies the other client terminal 10 of an instruction to resolve the inconsistency. Since the other client terminals 10 perform the conflict resolution process (cancellation of the editing operation) according to the instruction, even if the operation conflict occurs, the operation conflict can be appropriately resolved. If it is determined that the editing is consistent, the client terminal 10 is notified that the object state has been changed, and the other client terminal 10 functions as a server within a predetermined time after changing the object state. If the notification that the state of the object has been changed is not received from the client terminal 10 that performs the operation, it is possible to prevent the occurrence of the operation conflict by canceling the editing operation.

  The present invention is not limited to the above-described embodiments, and the configuration of the client terminal 10 and the server 20 and the control of the control unit can be changed as appropriate without departing from the spirit of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used in a collaborative work system that performs collaborative work using a plurality of terminals, an edit control program that controls editing in each terminal, a recording medium that records the edit control program, and an edit control method in the collaborative work system It is.

DESCRIPTION OF SYMBOLS 10 Client terminal 11 Control part 11a Operation determination part 11b Processing part 11c Communication control part 11d Management part 11e Determination part 11f Notification part 12 CPU
13 ROM
14 RAM
DESCRIPTION OF SYMBOLS 15 Memory | storage part 16 Communication I / F part 17 Display part 18 Operation part 20 Server 21 Control part 21a Management part 21b Judgment part 21c Notification part 21d Communication control part 22 CPU
23 ROM
24 RAM
25 Memory 26 Communication I / F 30 Work Screen 31 Object

Claims (24)

A management device that manages conference data including one or more objects and a plurality of terminals that receive and store the conference data from the management device are connected via a communication network, and the one or more terminals are connected to the plurality of terminals. A collaborative system that collaborates by browsing and editing objects
Each said terminal
An operation determination unit that receives an operation by the operation unit and determines whether an editing operation has been performed on the object;
A communication control unit that transmits editing information indicating the content of the editing operation to the management device and another terminal when it is determined that an editing operation has been performed on a predetermined object;
A processing unit that changes the state of the predetermined object based on the editing information when the editing information is received;
The management device
A management unit for storing and managing the conference data in a storage unit;
A determination unit that determines whether an editing operation on the predetermined object in the editing information is consistent with a state of the predetermined object in the conference data when the editing information is received from the terminal;
A notification unit for notifying the determination result of the determination unit to each of the terminals,
A collaborative work system characterized by that. The editing information includes information for specifying the predetermined object, information indicating a state of the predetermined object before the editing operation, and information indicating a state of the predetermined object after the editing operation. Including,
The collaborative work system according to claim 1. When the management unit of the management device determines that the editing operation is consistent, the management unit changes the state of the predetermined object of the conference data based on the editing information;
The notification unit of the management device notifies the terminal of the conference data after the change,
The processing unit of the terminal updates the stored conference data to the received conference data after the change,
The collaborative work system according to claim 1 or 2. When the management unit of the management device determines that the editing operation is consistent, the management unit changes the state of the predetermined object of the conference data based on the editing information;
The notification unit of the management device notifies each of the terminals that the state of the predetermined object has been changed,
The processing unit of the terminal cancels an editing operation on the predetermined object when the notification is not received within a predetermined time after changing the state of the predetermined object.
The collaborative work system according to claim 1 or 2. When the notification unit of the management device determines that the editing operation is not consistent and editing is inconsistent, it notifies each terminal of an instruction to resolve the contradiction,
When the processing unit of the terminal receives the notification, the processing unit cancels the editing operation on the predetermined object.
The collaborative work system according to claim 1 or 2. When the processing unit of the terminal cancels the editing operation, if there is an editing operation after the editing operation, the subsequent editing operation is also canceled.
The collaborative work system according to claim 4 or 5, characterized in that. When the processing unit of the terminal cancels the editing operation, there is an editing operation after the editing operation, and the parameter changed by the editing operation is also changed by the subsequent editing operation, The parameter in the editing operation is not changed,
The collaborative work system according to claim 4 or 5, characterized in that. The processing unit of the terminal changes the state of the predetermined object before editing in the subsequent editing information to the state of the predetermined object before editing in the editing information.
The collaborative work system according to claim 7. The operation determination unit of the terminal does not accept a next editing operation by the operation unit until cancellation of the editing operation is completed.
The collaborative work system according to any one of claims 4 to 8. When the notification unit of the management device determines that the editing operation is not consistent, it notifies each terminal of an instruction to prohibit the reception of the editing operation,
When the processing unit of the terminal receives the instruction from the management device, the processing unit does not accept a next editing operation by the operation unit.
The collaborative work system according to any one of claims 1 to 9. The notification unit of the management device notifies the terminal that has performed the editing operation that the editing operation is not consistent,
When the processing unit of the terminal that has performed the editing operation receives the notification from the management device, the processing unit confirms whether to reflect the editing operation, and when instructed to reflect the editing operation , Sending the instruction to the management device,
When the management unit of the management device receives the instruction, the management unit applies the editing operation to correct the conference data.
The collaborative work system according to any one of claims 1 to 10. The notification unit of the management device notifies the terminal that has performed the editing operation that the editing operation is not consistent,
When the processing unit of the terminal that has performed the editing operation receives the notification from the management device, the processing unit confirms whether to reflect the editing operation, and when instructed to reflect the editing operation, the processing unit Duplicating the object and applying the editing operation to the duplicated object,
The collaborative work system according to any one of claims 1 to 10. A management device that manages conference data including one or more objects and a plurality of terminals that receive and store the conference data from the management device are connected via a communication network, and the one or more terminals are connected to the plurality of terminals. An editing management program that operates on the management device in a collaborative work system that collaborates by browsing and editing objects of
In the management device,
A management process for storing and managing the conference data in a storage unit;
Whether or not the editing operation for the predetermined object in the editing information is consistent with the state of the predetermined object in the conference data when the editing information indicating the content of the editing operation for the predetermined object is received from the terminal Judgment process to judge,
A notification process for notifying each terminal of the determination result of the determination process;
An editing management program characterized by that. The editing information includes information for specifying the predetermined object, information indicating a state of the predetermined object before the editing operation, and information indicating a state of the predetermined object after the editing operation. Including,
The editing management program according to claim 13, wherein In the management process, when it is determined that the editing operation is consistent, the state of the predetermined object of the conference data is changed based on the editing information,
In the notification process, the conference data after the change is notified to each of the terminals.
The editing management program according to claim 13 or 14, In the management process, when it is determined that the editing operation is consistent, the state of the predetermined object of the conference data is changed based on the editing information,
In the notification process, each terminal is notified that the state of the predetermined object has been changed.
The editing management program according to claim 13 or 14, In the notification process, when it is determined that the editing operation is not consistent and editing is inconsistent, an instruction to resolve the contradiction is notified to each terminal.
The editing management program according to claim 13 or 14, In the notification process, if it is determined that the editing operation is not consistent, a notification for prohibiting the reception of the editing operation is notified to each of the terminals.
18. The editing management program according to claim 13, wherein the editing management program is any one of claims 13 to 17. In the notification process, the terminal that performed the editing operation is notified that the editing operation is not consistent,
In the management process, when an instruction to reflect the editing operation is received from the terminal, the conference data is corrected by applying the editing operation.
19. The editing management program according to claim 13, wherein the editing management program is any one of claims 13 to 18. A management device that manages conference data including one or more objects and a plurality of terminals that receive and store the conference data from the management device are connected via a communication network, and the one or more terminals are connected to the plurality of terminals. Edit management method in a collaborative work system that collaborates by browsing and editing objects of
Each said terminal
Accepting an operation by the operation unit, determining whether an editing operation has been performed on the object,
When it is determined that an editing operation has been performed on a predetermined object, editing information indicating the content of the editing operation is transmitted to the management device and another terminal,
When the edit information is received, the state of the predetermined object is changed based on the edit information,
The management device
Storing and managing the conference data in a storage unit;
When the editing information is received from the terminal, it is determined whether an editing operation on the predetermined object in the editing information is consistent with a state of the predetermined object in the conference data;
Notifying each of the terminals of the determination result;
An editing management method characterized by that. The editing information includes information for specifying the predetermined object, information indicating a state of the predetermined object before the editing operation, and information indicating a state of the predetermined object after the editing operation. Including,
21. The editing management method according to claim 20, wherein: The management device
If it is determined that the editing operation is consistent, the state of the predetermined object of the conference data is changed based on the editing information,
Notify each terminal of the changed meeting data,
The terminal
Update the stored conference data to the received conference data after the change,
The editing management method according to claim 20 or 21, wherein the editing management method is performed. The management device
If it is determined that the editing operation is consistent, the state of the predetermined object of the conference data is changed based on the editing information,
Notifying each of the terminals that the state of the predetermined object has changed,
The terminal
If the notification is not received within a predetermined time after changing the state of the predetermined object, the editing operation for the predetermined object is canceled.
The editing management method according to claim 20 or 21, wherein the editing management method is performed. The management device
If it is determined that the editing operation is not consistent and editing is inconsistent, an instruction to resolve the contradiction is sent to each terminal,
The terminal
When receiving the notification, cancel the editing operation for the predetermined object;
The editing management method according to claim 20 or 21, wherein the editing management method is performed.

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