JP3962738B2 - Electronic document browsing system - Google Patents

Description

  The present invention relates to a system for browsing electronic documents, and more particularly to a technique for protecting the security of electronic documents.

Conventionally, there are the following two systems for a user to browse an electronic document recorded on a server using a user terminal (hereinafter referred to as “client”).
The first system is a system in which a client accesses a server via a network and browses an electronic document. For example, Patent Document 1 discloses a technique in which a client accesses a Web server and browses an electronic document with a Web browser.

The second system is a system in which a client accesses a server via a network, downloads an electronic document, and browses the downloaded electronic document. When the server is a Web server, the client can download the electronic document using the download function of the Web browser.
JP 2001-356953 A

Although the above two systems are used, there is a demand for a system that is more convenient for various users such as a system administrator, a document creator, and a general user.
Therefore, the present invention has been made in view of the above-described demands, and an object thereof is to provide an electronic document browsing system that takes into account the convenience of various users while protecting the security of the electronic document.

  In order to achieve the above object, the present invention provides a browsing device for browsing an electronic document, the first layer in which the document is arranged, and a first layer associated with the first layer so as to cover at least a part of the first layer. In accordance with a display mode set by the control unit, an acquisition unit that acquires an electronic document file including two layers, a control unit that sets a display mode of the second layer according to a browsing situation, and the first mode And display means for displaying the second layer on the layer.

  In order to achieve the above object, the present invention provides an electronic document file creation apparatus for creating an electronic document file having a different display form according to a browsing situation, and includes a first layer on which a document is arranged. The stored storage means, the second layer generation means for generating the second layer associated so as to cover at least a part of the first layer, and the display form of the second layer in a situation of being browsed Control information generating means for generating browsing control information to be changed in response, and creating means for creating an electronic document file composed of the first layer, the second layer, and the browsing control information.

The present invention is a browsing device that acquires and browses an electronic document file that includes a first layer in which a document is arranged and a second layer that is associated so as to cover at least a part of the first layer. According to the situation, a display form of the second layer is set, and the second layer is superimposed on the first layer and displayed according to the set display form.
According to this configuration, when browsing the acquired electronic document file, different display forms can be taken depending on the browsing situation.

  Here, the browsing device determines whether or not the electronic document file is a file acquired via a network, and if the determination result is affirmative, the second layer transmits the second layer in a transparent mode. When the determination result is negative, the second layer is set to a non-transparent mode, and the second layer is set to a transparent mode so that the document can be seen. If the second layer is displayed in a non-transparent mode, the document may be displayed without being transmitted through the second layer so that the document cannot be seen.

  According to this configuration, when the electronic document file is not a file acquired via a network, the first layer can be hidden by the second layer. Therefore, the user cannot browse the electronic document file stored in the local disk of the browsing device, and can limit the browsing of the electronic document file to online browsing via the network.

  Here, the browsing device determines whether the electronic document file is a file acquired via a network, and, if the determination is affirmative, passes the second layer in a transparent mode. When the result of the determination is negative, a mode setting command for setting the second layer to a non-transparent mode and a display command for displaying the second layer on the first layer are displayed. The electronic document file may be acquired, the determination command may be executed, the setting command may be executed, and the display command may be executed.

According to this configuration, when the electronic document file is not a file acquired via the network, the browsing device conceals the first layer by the second layer by executing a command included in the electronic document file. Can do. Therefore, the browsing device may be a general-purpose computer.
Here, the browsing device determines whether or not a predetermined character string “http: //” is included in the path. If “http: //” is included in the path, the electronic document file is transmitted via the network. If “http: //” is not included, the electronic document file may be determined not to be acquired via a network.

According to this configuration, it is possible to easily determine whether or not the electronic document file is a file acquired via a network.
Here, the browsing apparatus performs first determination as to whether or not “http: //” is included in the path of the electronic document file, and whether the electronic document file is executed using plug-in software. Or the second determination as to whether the electronic document file is executed using application software, the first determination is affirmative, and the second determination is plug-in software, the electronic document file is The electronic document file may be determined to be a file acquired via the network. Otherwise, the electronic document file may be determined not to be a file acquired via the network.

According to this configuration, it is possible not only to determine the path of the electronic document file but also to determine whether the file is acquired via the network more reliably by determining the status of the file.
Here, the browsing device stores first identification information for identifying the browsing device, and the electronic document file includes second identification information for identifying a device permitted to browse the electronic document file. Determining whether or not the first identification information and the second identification information match, and when the first identification information and the second identification information match, the first determination and the second determination And when the first identification information and the second identification information do not match, prior to the first determination and the second determination, the second layer is configured to be set to a non-transparent mode. Also good.

According to this configuration, prior to the first determination and the second determination, whether or not browsing is permitted is determined based on the identifier of the browsing device. Therefore, only a legitimate browsing device user who is permitted to browse is electronically connected via the network. You can view document files.
Here, the electronic document file includes time information, and even when the browsing apparatus determines that the electronic document file is not a file acquired via a network, the second layer is set to a transparent mode. When set, the display means measures a browsing time indicating a time during which the electronic document file is displayed, and sets the second layer to the non-transparent mode when the measured browsing time matches the time information. You may comprise as follows.

According to this configuration, even when the electronic document file is not a file acquired via the network, the user can browse the electronic document file within the range of the first time information, which is convenient for the user. Rise.
The present invention also provides an electronic document file creation device for creating an electronic document file having a different display form depending on a browsing situation, storing a first layer on which a document is arranged, and storing a second layer. Generating and generating browsing control information for changing a display form of the second layer according to a browsing situation, and creating an electronic document file including the first layer, the second layer, and the browsing control information It is characterized by that.

According to this configuration, it is possible to create an electronic document file having a different display form depending on the browsing situation.
The electronic document file creation device determines whether the electronic document file is a file supplied to the browsing device via a network when the electronic document file is displayed on the browsing device. And a mode setting command for setting the second layer to the transparent mode when the determination is affirmative and setting the second layer to the non-transparent mode when the determination is negative. And the browsing control information including a display command for displaying the second layer on the first layer.

According to this configuration, since the electronic document file creation device creates an electronic document file including the above-described command, the browsing device executes the command embedded in the electronic document file even in a general-purpose computer such as a PC. Thus, the display form of the second layer can be changed.
Here, the electronic document file creation device further receives an input of a document, generates the first layer based on the document, stores the generated first layer, and stores the created electronic document file The electronic document file transmission request may be received from the browsing device, and when the request is received, the stored electronic document file may be read and transmitted to the browsing device.

  According to this configuration, the electronic document file creation device can create an electronic document from a document. That is, the electronic document can be created and the browsing control information can be created with a single device, and the system can be downsized.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As an embodiment according to the present invention, an electronic document browsing system 1 will be described with reference to the drawings.
<Outline of electronic document browsing system 1>
The electronic document browsing system 1 is a system that manages browsing of electronic documents in a company. In the present embodiment, the electronic document is obtained by converting technical data into a PDF (Portable Document Format) format.

FIG. 1 is a hardware configuration diagram showing the configuration of the electronic document browsing system 1. As shown in the figure, the electronic document browsing system 1 includes a document creation server 10, a file server 20, a file server 30, a user client 40, a user client 50, and an administrator client 60.
The document creation server 10, the file server 20, and the file server 30 are connected via a LAN, and each server and each client are connected via an intranet 70.

The document creation server 10 is a device that creates an electronic document. Each of the file server 20 and the file server 30 is an apparatus that creates and manages an electronic document file to be provided to the client from the electronic document created by the document creation server 10.
The user client 40 is a device possessed by a document creator, the user client 50 is a device possessed by a general user who views an electronic document, and the administrator client 60 is a device possessed by an administrator of the system. It is.

  Each client accesses the file server 20 or the file server 30 via the intranet 70 and browses an electronic document online. Each client downloads an electronic document from the file server 20 or the file server 30 to a local disk via the intranet 70, and browses the downloaded electronic document offline.

<Configuration of Document Creation Server 10>
FIG. 2 is a functional block diagram functionally showing the configuration of the document creation server 10. As shown in FIG. 1, the document creation server 10 includes a document input unit 101, an electronic document creation unit 102, a text field creation unit 103, a browsing information input unit 104, and an electronic document data output unit 105.

Specifically, the document creation server 10 is a computer system including a microprocessor, a ROM, a RAM, a hard disk unit, a network connection unit, and the like.
FIG. 3A shows a data structure of the electronic document data 110 as a specific example of the electronic document data. As shown in the figure, the electronic document data 110 includes an electronic document 111 and a text field 112. The text field 112 includes an attribute 113.

Below, based on the creation procedure of the electronic document data 110, each component of the document creation server 10 is demonstrated.
(1) Document input unit 101
Specifically, the document input unit 101 is word processing software, drawing software, or the like, and accepts input of document data via the word processing software, drawing software, or the like. Here, the document data is an arbitrary combination of a character string, a figure, and an image. The document input unit 101 passes the received document data to the electronic document creation unit 102.

The document input unit 101 is not limited to word processing software, drawing software, or the like, but may be configured by a data input interface connected to a scanner. The document input unit 101 may read a character string, a figure, and an image drawn on the paper via a scanner.
(2) Electronic document creation unit 102
The electronic document creation unit 102 receives document data from the document input unit 101, creates an electronic document 111 from the received document data, and passes the created electronic document 111 to the text field creation unit 103.

Specifically, the electronic document creation unit 102 includes a microprocessor, a ROM, a RAM, and the like. A PDF conversion program is stored in the ROM or the RAM, and when the microprocessor executes the PDF conversion program, the electronic document creation unit 102 creates an electronic document 111 that is a layer in which the document is arranged. .
(3) Text field creation unit 103
Specifically, the text field creation unit 103 includes a microprocessor, a ROM, a RAM, and the like.

When the text field creation unit 103 receives the electronic document 111 from the electronic document creation unit 102, the microprocessor creates a text field by executing a PDF conversion program stored in the ROM or RAM. Specifically, an annotation layer defined in the PDF format is used for the text field.
When the text field is output to the monitor of the client, it is displayed in a state where it is overlaid on the electronic document (see FIG. 18).

The text field creation unit 103 sets an attribute indicating the display form or the like in the created text field. The attribute includes four items of “background color”, “writing”, “display mode”, and “print mode”.
The “background color” indicates the color of the text field displayed when the text field is output to the client monitor.

“Write” is set to either “permitted” or “impossible”. “Yes” indicates that writing to the text field is permitted when the electronic document and the text field are output to the client monitor, and “No” indicates that writing to the text field is prohibited. It shows that.
The “display mode” is set to either “transparent” or “non-transparent”. “Transparent” indicates that when the electronic document and the text field are output to the client monitor, the text field is transparently displayed so that the electronic document located below the text field can be viewed. “Non-transparent” indicates that the electronic document located below the text field is hidden and displayed without being transparent so that the electronic document cannot be viewed.

  The “print mode” is set to either “print” or “non-print”. “Print” indicates that when the electronic document and the text field are output to the client monitor, the electronic document located below the text field is not printed, so that the text field is printed. "" Indicates that the text field is not printed in order to enable printing of the electronic document located below the text field.

The attribute is initially set by the text field creation unit 103, and then the setting is changed by the client in accordance with the situation in which the electronic document and the text field are output to the monitor.
Specifically, an attribute 113 set in the text field 112 by the text field creation unit 103 is shown in FIG. As shown in the figure, the attributes 113 are “background color: white”, “write: impossible”, “display mode: non-transparent”, and “print mode: print”.

  When the electronic document 111 and the text field 112 in which the attribute 113 is set are output to the monitor of the client, the color of the displayed text field 112 is white from “background color: white”, and “write: impossible”. Thus, writing to the text field 112 is prohibited, and the text field 112 is not transmitted from the “display mode: non-transparent”, the electronic document 111 located below is hidden and cannot be viewed, and “print mode: print”. Thus, the text field 112 is printed, and the electronic document 111 located below is not printed.

The text field creation unit 103 outputs electronic document data 110 including the electronic document 111 and the text field 112 (including the attribute 113) received from the electronic document creation unit 102 to the electronic document data output unit 105.
(4) Browsing information input unit 104
The browsing information input unit 104 receives input of browsing information, which is information related to browsing of an electronic document, from an administrator of the system. The browsing information has a one-to-one correspondence with the electronic document created by the electronic document creation unit 102, and uniquely identifies the client name that can browse the corresponding electronic document online. The device ID and the time during which the client can browse the electronic document offline are described. The browsing information input unit 104 outputs the received browsing information to the electronic document data output unit 105.

The browsing information 120 illustrated in FIG. 4 is information regarding browsing of the electronic document 111. Since the browsing information 120 includes the administrator client 60, the user client 40, and the user client 50 as client names, it is these clients that are permitted to browse the electronic document 111 online. .
According to the browsing information 120, the device ID of the administrator client 60 is “ID_C”, and the electronic document 111 can be browsed “unlimited” even in the offline state. The device ID of the user client 40 is “ID_A”, and the electronic document 111 can be browsed up to “2 hours” even when offline. The device ID of the user client 50 is “ID_B”, and the electronic document 111 cannot be browsed when offline. That is, the administrator of the system can browse the electronic document 111 without limitation even when offline, and a general user cannot browse the electronic document 111 offline. On the other hand, the creator of the electronic document 111 can browse for up to two hours even when offline.

In this system, it is assumed that none of the clients can browse electronic documents that are not permitted to be viewed online.
Further, it is assumed that the administrator client 60 can browse all electronic documents. Further, it is assumed that the administrator already knows the device ID “ID_A” of the user client 40 and the device ID “ID_B” of the user client 50.

(5) Electronic document data output unit 105
The electronic document data output unit 105 receives electronic document data from the text field creation unit 103. Further, the electronic document data output unit 105 receives browsing information from the browsing information input unit 104.
The electronic document data output unit 105 determines whether the electronic document is an electronic document that is permitted to be viewed only by the administrator client 60 based on the browsing information corresponding to the electronic document included in the received electronic document data. Alternatively, it is determined whether the electronic document is permitted to be viewed by both the administrator client 60 and the other user clients.

  When the electronic document is permitted to be browsed only by the administrator client 60, the electronic document data output unit 105 transmits the electronic document data to the file server 30. When the electronic document is permitted to be viewed by the user client 40 and the user client 50 in addition to the administrator client 60, the electronic document data output unit 105 stores the electronic document data in the file server 20 and Transmit to the file server 30.

Here, according to the browsing information 120 corresponding to the electronic document 111, the electronic document 111 is permitted to be browsed by the user client 40, the user client 50, and the administrator client 60. Transmits the electronic document data 110 to the file server 20 and the file server 30.
<Configuration of File Server 20>
The file server 20 receives electronic document data and browsing information from the document creation server 10, and provides them to the user client 40, the user client 50, and the administrator client 60 from the received electronic document data and browsing information. The electronic document file is generated, and the generated electronic document file is stored.

Further, the file server 20 receives a request from the Web browser of each client, and provides the stored electronic document file to each client via the intranet 70.
FIG. 5 is a functional block diagram functionally showing the configuration of the file server 20. As shown in FIG. 1, the file server 20 includes an electronic document data input unit 201, an electronic document file generation unit 202, a file storage unit 203, an electronic document file reading unit 204, and an electronic document file output unit 205.

Specifically, the file server 20 is a computer system including a microprocessor, a ROM, a RAM, a hard disk unit, a network connection unit, and the like.
Hereinafter, as an example, a case will be described in which the file server 20 receives the electronic document data 110 illustrated in FIG. 3A and the browsing information 120 illustrated in FIG. 4 from the document creation server 10.

(1) Electronic document data input unit 201
The electronic document data input unit 201 is connected to the document creation server 10 via the LAN, and receives the electronic document data 110 and the browsing information 120 from the electronic document data output unit 105. The electronic document data input unit 201 outputs the received electronic document data 110 and browsing information 120 to the electronic document file generation unit 202.

(2) Electronic document file generation unit 202
The electronic document file generation unit 202 receives the electronic document data 110 and the browsing information 120 from the electronic document data input unit 201, generates an electronic document file 210 from the received electronic document data 110 and the browsing information 120, and generates the generated electronic document file 210. The document file 210 is stored in the file storage unit 203.

  FIG. 6 is a diagram showing the data structure of the electronic document file 210. As shown in the figure, the electronic document file 210 includes an electronic document 111, a text field 112, mode control information 114, offline information 115, and file identification information 116. The electronic document 111 and the text field 112 are the same data as the electronic document data 110, and the text field 112 includes an attribute (initial setting) 113.

The electronic document file generation unit 202 embeds the mode control information 114 (see FIG. 7a) in the electronic document data 110, adds the offline information 115 (see FIG. 7b) with reference to the browsing information 120, and further adds the file The electronic document file 210 is generated by adding “A-0001” as the identification information 116.
FIG. 7A shows a part of the mode control information 114. The mode control information 114 is a program written in a script language, and the client opens the electronic document file 210 using browsing software. And a program for causing the client to execute the following commands (A1) to (C1).

(A1) It is determined whether or not “http: //” is included at the beginning of the path of the electronic document file 210.
(B1) When “http: //” is included, the attribute display mode is set to “transparent”.
(C1) When “http: //” is not included, the attribute display mode is set to “non-transparent”.
FIG. 7B shows the data structure of the offline information 115. The electronic document file generation unit 202 generates the offline information 115 by extracting the device ID and the offline browsing possible time from the received browsing information 120.

The electronic document file generation unit 202 adds file identification information “A-0001”, which is data for identifying the electronic document file 210.
The electronic document file generation unit 202 stores the generated electronic document file 210 in the file storage unit 203.
(3) File storage unit 203
The file storage unit 203 is specifically an HDD, and receives and stores the electronic document file 210 output from the electronic document file generation unit 202.

(4) Electronic document file reading unit 204
The electronic document file reading unit 204 receives file identification information via the electronic document file output unit 205 and reads an electronic document file from the file storage unit 203 based on the file identification information. The electronic document file reading unit 204 outputs the read electronic document file to the electronic document file output unit 205.

(5) Electronic document file output unit 205
The electronic document file output unit 205 receives a request including file identification information from the user client 40, the user client 50, and the administrator client 60 via the intranet 70, and electronically converts the file identification information included in the received request to the electronic document file output unit 205. The data is output to the document file reading unit 204. Also, the electronic document file output unit 205 receives the electronic document file from the electronic document file reading unit 204 and transmits the received electronic document file to the requesting client via the intranet 70.

<Configuration of File Server 30>
Similarly to the file server 20, the file server 30 receives electronic document data and browsing information from the document creation server 10, and an electronic document to be provided to the administrator client 60 from the received electronic document data and browsing information. A file is generated and the generated electronic document file is stored.

Further, similarly to the file server 20, the file server 30 receives a request from the Web browser of each client and provides the stored electronic document file to each client via the intranet 70.
The file server 30 includes an electronic document data input unit, an electronic document file generation unit, a file storage unit, an electronic document file reading unit, and an electronic document file output unit. Since each component of the file server 30 has the same function as each component of the file server 20, a functional block diagram of the file server 30 is not shown, and detailed description thereof is omitted.

In the following, as an example, the electronic document data 110 shown in FIG. 3A and the browsing information 120 shown in FIG. The document file generation unit will be described.
The electronic document file generation unit receives the electronic document data 110 and the browsing information 120 from the electronic document data input unit, generates an electronic document file 220 from the received electronic document data 110 and the browsing information 120, and generates the generated electronic document file 220 is stored in the file storage unit.

  FIG. 8 is a diagram showing a data configuration of the electronic document file 220. As shown in the figure, the electronic document file 220 includes an electronic document 111, a text field 112, mode control information 224, offline information 225, and file identification information 226. The electronic document 111 and the text field 112 are the same data as the electronic document data 110, and the text field 112 includes an attribute (initial setting) 113.

The electronic document file generation unit embeds the mode control information 224 in the electronic document data 110, adds offline information 225 with reference to the browsing information 120, and adds “B-0001” as the file identification information 226. Thus, the electronic document file 220 is generated.
The mode control information 224 is a program written in a script language, and when the client opens the electronic document file 220 using browsing software, the client executes the following commands (A2) to (E2). It is a program for.

  (A2) It is determined whether or not “http: //” is included at the beginning of the path of the electronic document file 220. (B2) When “http: //” is not included at the head of the bus, the attribute display mode is set to “non-transparent”. (C2) If “http: //” is included at the beginning of the path, the device ID of the client is determined. (D2) If the device ID is not “ID_C”, the attribute display mode is set to “non-transparent”. (E2) When the device ID is “ID_C”, the attribute display mode is set to “transparent”.

Further, the electronic document file generation unit extracts the device ID “ID_C” associated with the administrator client 60 and the offline viewable time “unlimited” from the received browsing information 120, and offline information 225. Is generated.
Further, the electronic document file generation unit adds file identification information “B-0001” which is data for identifying the electronic document file 220.

The electronic document file generation unit stores the generated electronic document file 220 in the file storage unit.
<Operation of electronic document file creation processing>
Here, the operation of the electronic document file creation processing in the electronic document browsing system 1 will be described using the flowcharts shown in FIGS.

First, the operation of the document creation server 10 will be described using the flowchart shown in FIG.
The document input unit 101 of the document creation server 10 accepts input of a document (step S101), and outputs the accepted document to the electronic document creation unit 102. The electronic document creation unit 102 receives a document from the document input unit 101, converts the received document, and generates an electronic document (step S102). The electronic document creation unit 102 outputs the generated electronic document to the text field creation unit 103.

  When the text field creation unit 103 receives the electronic document from the electronic document creation unit 102, the text field creation unit 103 creates a text field (step S103), and sets the attribute 113, which is an initial attribute, in the created text field (step S104). . The text field creation unit 103 outputs to the electronic document data output unit 105 electronic document data including the electronic document and the text field in which the attribute 113 is set.

The browsing information input unit 104 receives input of browsing information (step S <b> 105), and outputs the received browsing information to the electronic document data output unit 105.
The electronic document data output unit 105 receives electronic document data from the text field creation unit 103 and receives browsing information from the browsing information input unit 104. The electronic document data output unit 105 reads the browsing information and determines whether or not only the administrator client 60 is permitted to browse the electronic document. When browsing of the electronic document is permitted only to the administrator client 60 (YES in step S106), the electronic document data output unit 105 sends the electronic document data and the browsing information to the file server 30 via the LAN. Transmit (step S107). When browsing of the electronic document is permitted to clients other than the administrator client 60 (NO in step S106), the electronic document data output unit 105 sends the electronic document data and the browsing information to the file via the LAN. It transmits to the server 20 and the file server 30 (step S108).

Next, the operation of the file server 20 will be described using the flowchart shown in FIG. The operation described here is a continuation of step S108 in FIG.
The electronic document data input unit 201 of the file server 20 receives the electronic document data and the browsing information from the document creation server 10 (step S201), and sends the received electronic document data and the browsing information to the electronic document file generation unit 202. Output.

  The electronic document file generation unit 202 receives the electronic document data and the browsing information from the electronic document data input unit 201, and embeds the mode control information 114 in the electronic document data (step S202). Further, the electronic document file generation unit 202 extracts the device ID of the browsable client described in the browsing information and the offline browsing time, and generates offline information (step S203). Furthermore, the electronic document file generation unit 202 adds file identification information (step S204), generates an electronic document file including the electronic document, text field, mode control information, offline information, and file identification information, and stores the file. The data is stored in the unit 203 (step S205).

Next, the operation of the file server 30 will be described using the flowchart shown in FIG. The operation described here is a continuation of step S107 and step S108 in FIG.
The electronic document data input unit of the file server 30 receives the electronic document data and the browsing information from the document creation server 10 (step S301), and outputs the received electronic document data and the browsing information to the electronic document file generation unit. .

  The electronic document file generation unit receives the electronic document data and the browsing information from the electronic document data input unit, and embeds the mode control information 224 in the electronic document data (step S302). Further, the electronic document file generation unit extracts the device ID of the administrator client 60 described in the browsing information and the offline browsing available time, and generates offline information (step S303). Further, the electronic document file generation unit adds file identification information (step S304), generates an electronic document file including the electronic document, text field, mode control information, offline information, and file identification information, and stores the file storage unit. (Step S305).

<Configuration of User Client 40>
Here, the configuration of the user client 40 will be described. The user client 40 is a device that the user who created the electronic document 111 has.
FIG. 12 is a functional block diagram functionally showing the configuration of the user client 40.
As shown in the figure, the user client 40 includes a transmission / reception unit 301, a request reception unit 302, a device ID storage unit 303, a Web browser 304, a hard disk 312, an application software execution unit 313, a display control unit 317, an input unit 318, and The monitor 319 is configured.

The web browser 304 includes a file acquisition unit 305, a writing unit 306, a storage unit 307, an HTML interpreter unit 308, a display data creation unit 309, a download unit 310, and a writing unit 311.
The application software execution unit 313 includes a data transmission / reception unit 314, a script control unit 315, and a display data development unit 316.

  Specifically, the user client 40 is a computer system including a microprocessor, a ROM, a RAM, a hard disk unit, a network connection unit, a keyboard, a mouse, and the like. When the microprocessor executes the computer program, the user client 40 acquires and displays the electronic document file. Each component will be described below.

(1) Transmission / reception unit 301
The transmission / reception unit 301 is a network connection unit, and transmits / receives data between the file server 20 and the file server 30 and the web browser 304 via the intranet 70.
(2) Request reception unit 302
The request receiving unit 302 receives an input signal from the input unit 318. Input signals related to the electronic document browsing process include a browser request, a download request, and a display request. The browser request requests online viewing of the electronic document, the download request requests downloading of the electronic document, and the display request requests display (viewing) of the already downloaded electronic document.

When accepting a browser request, the request accepting unit 302 notifies the Web browser 304 to that effect, and when accepting a download request, notifies the Web browser 304 to that effect. When receiving the display request, the request reception unit 302 notifies the application software execution unit 313 to that effect.
The browser request, download request, and display request each include file identification information that identifies an electronic document file.

(3) Device ID storage unit 303
The device ID storage unit 303 includes an area for storing the device ID “ID_A”. The device ID “ID_A” is information unique to the user client 40 and is used in an electronic document browsing process by an application software execution unit described later. As an example, the device ID storage unit 303 reads the device ID “ID_A” stored in the IC card and stores it inside.

(4) Web browser 304
The web browser 304 is application software for browsing web pages, communicates via the intranet 70 using the HTTP communication protocol, receives electronic document files, HTML files, image files, music files, etc. Analyze and display and play.

  The file acquisition unit 305 receives a browser request from the request reception unit 302. Here, it is assumed that the browser request includes “A-0001” as file identification information. The file acquisition unit 305 transmits the received browser request to the file server 20 via the transmission / reception unit 301 and the intranet 70. The file acquisition unit 305 receives the electronic document file 210 corresponding to the file identification information “A-0001” from the file server 20. The file acquisition unit 305 writes the received electronic document file 210 to the storage unit 307 via the writing unit 306. Here, the storage unit 307 is a memory that temporarily stores the electronic document file 210.

The HTML interpreter unit 308 decodes the HTML hypertext acquired from the storage unit 307 by the display data creation unit 309.
When the display data creation unit 309 acquires the electronic document file 210 from the storage unit 307, the display data creation unit 309 outputs the acquired electronic document file 210 to the data transmission / reception unit 314 of the application software execution unit 313. Thereafter, the display data creation unit 309 receives electronic document data for which a display layout has been determined from the data transmission / reception unit 314. When the electronic document data is received from the data transmission / reception unit 314, the HTML interpreter unit 308 and the display data creation unit 309 create display data to be output to the monitor, and output the created display data to the display control unit 317.

When the web browser 304 acquires a normal HTML file other than an electronic document file by the file acquisition unit 305, display data to be output to the monitor 319 by the HTML interpreter unit 308 and the display data creation unit 309. And the created display data is output to the display control unit 317.
The download unit 310 receives a download request from the request reception unit 302. Here, it is assumed that the download request includes “A-0001” as the file identifier. The download unit 310 transmits the received download request to the file server 20 via the transmission / reception unit 301 and the intranet 70. The download unit 310 receives the electronic document file 210 corresponding to the file identification information “A-0001” from the file server 20. The download unit 310 writes the electronic document file 210 to the hard disk 312 via the writing unit 311.

Note that the file acquisition unit 305 and the download unit 310 can acquire the electronic document file 220 corresponding to the file identification information “B-0001” from the file server 30 in the same manner as described above.
(5) Hard disk 312
The hard disk 312 receives and stores the electronic document file 210 acquired from the file server 20 by the download unit 310 of the Web browser 304 or the electronic document file 220 acquired from the file server 30 via the writing unit 311. Also, the hard disk 312 receives an instruction from the application software execution unit 313 and outputs the electronic document file 210 or the electronic document file 220 stored therein to the application software execution unit 313.

(6) Application software execution unit 313
Specifically, the application software execution unit 313 is realized by electronic document browsing software or the like. As shown in FIG. 12, the application software execution unit 313 includes a data transmission / reception unit 314, a script control unit 315, and a display data development unit 316.
First, the operation of the entire application software execution unit 313 will be described with reference to the flowchart shown in FIG.

The data transmission / reception unit 314 of the application software execution unit 313 acquires data serving as a basis of display data to be displayed on the monitor 319 from the display data creation unit 309 of the Web browser 304 or the hard disk 312 (step S1001).
The data transmission / reception unit 314 outputs the data acquired in step S1001 to the script control unit 315, the script control unit 315 executes the script included in the acquired data (step S1002), and the display data expansion unit 316 Display data is created on the basis of the execution result (step S1003).

When the activation source of the application software execution unit 313 is a user (“user” in step S 1004 ), the display data expansion unit 316 passes the created display data to the display control unit 317 via the data transmission / reception unit 314 (step S 1004 ). S1005).
When the activation source of the application software execution unit 313 is the web browser 304 (“browser” in step S1004), the display data expansion unit 316 returns the created display data to the web browser 304 (step S1006).

Next, a case where the application software execution unit 313 creates display data based on a browser request and a case where display data is created based on a display request instructed by a user will be described.
<Browser request>
In the case of display data generation processing based on a browser request, the data transmission / reception unit 314 of the application software execution unit 313 receives and receives an electronic document file (here, the electronic document file 210 is taken as an example) from the display data creation unit 309. The electronic document file 210 is output to the script control unit 315.

  The script control unit 315 sets the attribute of the text field 112 by reading out the mode control information 114 from the electronic document file 210 and executing it. The script control unit 315 outputs the electronic document 111 and the text field 112 in which the attribute is set to the display data development unit 316. Here, the attributes of the text field 112 set by the script control unit 315 are background color: white, writing: impossible, display mode: transparent, and printing mode: non-printing.

The display data expansion unit 316 generates display data in which the transparent text field 112 is superimposed on the electronic document 111 according to the attribute set in the text field 112, and outputs the generated display data to the data transmission / reception unit 314. To do.
The data transmission / reception unit 314 receives display data from the display data development unit 316 and outputs the display data to the monitor 319 via the display control unit 317.

<Display request>
In the case of display data generation processing based on a display request, the application software execution unit 313 receives a display request including file identification information from the request reception unit 302. Here, it is assumed that the application software execution unit 313 receives a display request including file identification information “A-0001”. The data transmission / reception unit 314 of the application software execution unit 313 reads the electronic document file 210 corresponding to “A-0001” from the hard disk 312 and outputs the electronic document file 210 to the script control unit 315.

  The script control unit 315 sets the attribute of the text field 112 by reading out the mode control information 114 from the electronic document file 210 and executing it. The script control unit 315 outputs the electronic document file 210 including the text field in which the attribute is set to the display data development unit 316. Here, the attributes of the text field 112 set by the script control unit 315 are background color: white, writing: impossible, display mode: non-transparent, and printing mode: printing.

Further, the application software execution unit 313 reads the device ID “ID_A” from the device ID storage unit 303 and outputs it to the display data development unit 316.
The display data development unit 316 determines whether or not the device ID “ID_A” is described in the offline information 115 included in the electronic document file 210 received from the script control unit 315. Here, “ID_A” is described in the offline information 115.

The display data expansion unit 316 acquires the browseable time “2 hours” associated with “ID_A” from the offline information 115. When the browsing available time “2 hours” is acquired, the display data expansion unit 316 resets the internal timer and starts measuring the browsing time.
The display data expansion unit 316 monitors the browsing time measured by the timer at regular intervals, and when the browsing time is equal to or shorter than the viewable time “2 hours”, the display mode of the attribute of the text field 112 is set to “transparent”. To "". The display data expansion unit 316 superimposes the transmitted text field 112 on the electronic document 111 and outputs the same to the data transmission / reception unit 314. When the viewing time measured by the timer exceeds the viewable time “2 hours”, the display data expansion unit 316 sets the attribute display mode to “non-transparent” and sets the non-transparent text field 112 to the electronic document 111. Is output to the data transmission / reception unit 314.

  Next, consider a case where the application software execution unit 313 receives a display request including the file identification information “B-0001” from the request reception unit 302. The data transmission / reception unit 314 of the application software execution unit 313 reads the electronic document file 220 corresponding to the file identification information “B-0001” from the hard disk 312 and passes it to the script control unit 315. The script control unit 315 sets the attribute of the text field 112 by executing the script, and outputs the electronic document file 220 including the text field 112 in which the attribute is set to the display data development unit 316. Further, the application software execution unit 313 reads the device ID “ID_A” from the device ID storage unit 303 and outputs it to the display data development unit 316.

  The display data expansion unit 316 determines whether “ID_A” is described in the offline information 225 of the electronic document file 220. Here, “ID_A” is not described in the offline information 225. In this case, the display data expansion unit 316 sets the attribute display mode to non-transparent, and outputs the non-transparent text field 112 on the electronic document 111 to the data transmission / reception unit 314.

(7) Display control unit 317
The display control unit 317 receives display data output from the display data creation unit 309 of the Web browser 304 and the display data development unit 316 of the application software execution unit 313, and outputs the received display data to the monitor 319.
(8) Input unit 318
The input unit 318 includes a keyboard, a mouse, and the like. When the input unit 318 is operated by the user, the input unit 318 generates an input signal corresponding to the operation and outputs the generated input signal to the request reception unit 302.

(9) Monitor 319
The monitor 319 is a display unit, and displays various display data output from the display control unit 317 on the display.
<Difference between online and offline>
FIG. 14 is a diagram showing a difference in data flow between online browsing and offline browsing of an electronic document. The reference numerals in the user client 40 shown in the figure indicate the components described in FIG.

  A route indicated by an arrow A indicates a data flow when the electronic document is browsed online. When browsing an electronic document online, the Web browser 304 of the user client 40 acquires an electronic document file from the file server via the intranet 70. First, the electronic document file acquired by the file acquisition unit 305 is output to the application software execution unit 313 via the writing unit 306, the storage unit 307, and the display data creation unit 309. In the electronic document file, the application software execution unit 313 determines the attribute of the text field and the layout of the electronic document. The electronic document file is output again from the application software execution unit 313 to the display data creation unit 309 of the Web browser 304 and is output to the monitor 319 via the display control unit 317.

  A path indicated by an arrow B indicates a data flow when the electronic document is browsed offline. When browsing an electronic document offline, the Web browser 304 of the user client 40 acquires an electronic document file from the file server via the intranet 70. First, the electronic document file acquired by the download unit 310 is written to the hard disk 312 via the writing unit 311. Thereafter, when a display request is received, the electronic document file is read into the application software execution unit 313 and output to the monitor 319 via the display control unit 317.

<Configuration of User Client 50>
Similarly to the user client 40 of FIG. 12, the user client 50 includes a transmission / reception unit, a request reception unit, a device ID storage unit, a Web browser, application software execution unit, a hard disk, an input unit, and a monitor. The Web browser further includes a file acquisition unit and a download unit, and the application software execution unit includes a data transmission / reception unit, a script control unit, and a display data expansion unit. A functional block diagram of the user client 50 is not shown.

Specifically, the user client 50 is a computer system. When the microprocessor executes a computer program, the user client 50 acquires and displays an electronic document file.
The processing of the Web browser and application software execution unit when browsing an electronic document online is the same as that of the user client 40.

The device ID storage unit holds a device ID “ID_B”, which is information unique to the user client 50. Similarly to the user client 40, the device ID storage unit may be configured to read “ID_B” recorded on an IC card, for example.
When the application software execution unit receives a display request including the file identification information “A-0001” from the request reception unit, the application software execution unit reads the electronic document file 210 stored in the hard disk, and further, the device ID “ID_B” from the device ID storage unit. "Is read out.

  The script control unit of the application software execution unit executes the script included in the electronic document file 210 and sets the attribute of the text field 112. The display data expansion unit of the application software execution unit receives the electronic document file 210 in which the attribute of the text field 112 is set from the script control unit, and stores the device in offline information 115 (see FIG. 7b) included in the electronic document file 210. It is determined whether or not the ID “ID_B” is described. Since the ID “ID_B” is described in the offline information 115, the display data expansion unit obtains the browseable time “0 hour” associated with “ID_B”. When the viewable time “0 hour” is acquired, the display data developing unit resets the internal timer and starts measuring the browse time.

  When the viewing time measured by the timer is equal to or shorter than the viewable time, the display data development unit sets the display mode of the attribute of the text field 112 to “transparent” and sets the transparent text field 112 to the electronic document. The data is superimposed on 111 and output to the data transmitter / receiver. When the viewing time measured by the timer exceeds the viewable time, the display data development unit sets the attribute display mode to “non-transparent” and superimposes the non-transparent text field 112 on the electronic document 111. Output to the data transmitter / receiver.

The application software execution unit performs the same processing when the electronic document file 220 is acquired from the hard disk.
In the above specific example, since the acquired browsing available time is “0 hours”, the browsing time measured by the timer exceeds the browsing available time from the start of processing. Therefore, the display data development unit always sets the display mode of the text field 112 to “non-transparent” and outputs it. Thus, the electronic document 111 is hidden by the text field 112, and the user cannot browse the electronic document 111 offline.

<Configuration of Administrator Client 60>
Similar to the user client 40 of FIG. 12, the administrator client 60 includes a transmission / reception unit, a request reception unit, a device ID storage unit, a Web browser, application software execution unit, a hard disk, an input unit, and a monitor. The Web browser further includes a file acquisition unit and a download unit, and the application software execution unit includes a data transmission / reception unit, a script control unit, and a display data expansion unit. A functional block diagram of the administrator client 60 is not shown.

Specifically, the administrator client 60 is a computer system, and the administrator client 60 acquires and displays an electronic document file when the microprocessor executes a computer program.
The processing of the Web browser and application software execution unit when browsing an electronic document online is the same as that of the user client 40.

The device ID storage unit holds a device ID “ID_C” that is information unique to the administrator client 60.
When the application software execution unit receives a display request including the file identification information “A-0001” from the request reception unit, the application software execution unit reads the electronic document file 210 stored in the hard disk, and further receives the device ID “ID_C” from the device ID storage unit. "Is read out.

  The script control unit executes a script included in the electronic document file 210 and sets the attribute of the text field 112. The display data development unit receives the electronic document file 210 in which the attribute of the text field 112 is set from the script control unit, and determines whether the device ID “ID_C” is described in the offline information 115 of the electronic document file 210. . Here, since “ID_C” is described, the display control unit obtains the browsing possible time “unlimited” associated with “ID_C”. When the browsing possible time “unlimited” is acquired, the display control unit resets the timer and starts measuring the browsing time.

  If the viewing time measured by the timer is less than the viewable time, the display control unit sets the display mode of the text field to “transparent” and places the transparent text field 112 on the electronic document 111. The data is output to the data transmitter / receiver. When the viewing time measured by the timer exceeds the viewable time, the display data development unit sets the display mode of the text field 112 to “non-transparent” and places the non-transparent text field 112 on the electronic document 111. The data is output to the data transmitter / receiver.

In the above specific example, since the browsing possible time is “unlimited”, the administrator client 60 always outputs the text field 112 with the display mode set to “transparent”. Accordingly, the electronic document 111 is not hidden by the text field 112, and the administrator can always browse the electronic document 111 offline.
The application software execution unit performs the same processing when the electronic document file 220 is acquired from the hard disk.

<Operation of electronic document file browsing process>
Here, the operation of the electronic document file browsing process in the user client 40, the user client 50, and the administrator client 60 will be described using the flowchart shown in FIG. Here, the user client 40, the user client 50, and the administrator client 60 are simply referred to as “clients”, respectively.

  The client request receiving unit receives the request via the input unit (step S401). When the received request is a browser request (“browser” in step S402), the request reception unit outputs a browser request including file identification information to the Web browser. The file acquisition unit of the Web browser acquires an electronic document file from the file server (step S404). The electronic document file acquired here is an electronic document file identified by file identification information included in the browser request. The file acquisition unit stores the acquired electronic document file in the storage unit (step S405).

Thereafter, the electronic document file once stored in the storage unit is output to the application software execution unit via the display data creation unit. Upon receiving the electronic document file, the application software execution unit performs processing according to the mode control information included in the electronic document file (step S412).
When the request received in step S401 is a download request (“download” in step S402), the request reception unit outputs a download request including file identification information to the Web browser. The download unit of the web browser acquires an electronic document file from the file server (step S406). The electronic document file acquired here is an electronic document file identified by file identification information included in the browser request. The writing unit stores the electronic document file acquired by the download unit in the hard disk (step S407).

  Thereafter, when the request receiving unit receives a display request (step S408), the request receiving unit outputs a display request including file identification information to the application software execution unit, and the application software is activated (step S409). The application software execution unit performs processing according to the mode control information included in the electronic document file (step S410), and then performs application mode processing (step S413).

Thereafter, the monitor displays the display data output from the display control unit on the monitor (step S414).
<Processing by mode control information 114>
Here, the processing operation by the mode control information 114 will be described using the flowchart shown in FIG. The mode control information 114 is a program embedded in the electronic document data by the file server 20. Note that the operations described here are the details of step S410 and step S412 in the flowchart shown in FIG.

  The script control unit determines the path of the electronic document file (step S501). If “http: //” is included at the beginning of the path (YES in step S502), the display mode of the attribute included in the text field of the electronic document file is set to “transparent” (step S503). If “http: //” is not included at the beginning of the path (NO in step S502), the display mode of the attribute included in the text field is set to “non-transparent” (step S504), and the text field is superimposed on the electronic document. Output, and return to step S405 to continue the process.

<Processing by mode control information 224>
Here, the processing operation by the mode control information 224 will be described using the flowchart shown in FIG. The mode control information 224 is a program embedded in the electronic document data by the file server 30. Note that the operations described here are the details of step S410 and step S412 in the flowchart shown in FIG.

  The script control unit determines the path of the electronic document file (step S601). If “http: //” is not included at the beginning of the path (NO in step S602), the process proceeds to step S606, where the display mode of the attribute included in the text field is set to “non-transparent” (step S606), Output text fields superimposed. Thereafter, the process returns to step S405 and continues.

  When “http: //” is included at the head of the path (YES in step S602), the script control unit acquires a device ID from the device ID storage unit and determines the acquired device ID (step S603). If the acquired device ID is “ID_C” (YES in step S604), the display mode of the attribute included in the text field is set to “transparent” (step S605), and the text field is superimposed on the electronic document and output. . Thereafter, the process returns to step S405 and continues.

If the acquired device ID is not “ID_C” (NO in step S604), the display mode of the attribute included in the text field is set to “non-transparent” (step S606), and the text field is superimposed on the electronic document and output. Thereafter, the process returns to step S405 and continues.
<Application mode operation>
Here, the processing operation in the application mode will be described with reference to the flowchart shown in FIG. The operation described here is the details of step S413 in the flowchart shown in FIG.

  The application software execution unit reads offline information from the electronic document file (step S701). The application software execution unit reads the device ID from the device ID storage unit. The application software execution unit determines whether the offline information read in step S701 includes its own device ID. If the device ID is not included (NO in step S702), the application software execution unit sets the display mode of the attribute included in the text field to “non-transparent” (step S707), and outputs the text field superimposed on the electronic document. To do. Thereafter, the process returns to step S405 and continues.

When the device ID is included (YES in step S702), the application software execution unit obtains the viewable time associated with the device ID (step S703), resets the timer held inside, and then displays the time. Is started (step S704).
The application software execution unit compares the time measured by the timer with the viewable time acquired in step S703. When the time measured by the timer is equal to or shorter than the viewable time (YES in step S705), the application software execution unit sets the display mode of the attribute included in the text field to “transparent” (step S706). Output a text field superimposed on the document. Thereafter, the process returns to step S705 and continues.

If the time measured by the timer exceeds the viewable time (NO in step S705), the application software execution unit sets the display mode of the attribute included in the text field to “non-transparent” (step S707). The text field is superimposed on the electronic document and output. Then, it returns to step S405 and continues a process.
<Text field attributes>
FIG. 18 is an explanatory diagram for a display mode of attributes included in the text field 112.

(A) is a figure which shows the state of the text field 112 displayed on a monitor, and the electronic document 111, when display mode is set to "non-transparent". Since the text field 112 is displayed so as to be superimposed on the electronic document 111, the user cannot view the electronic document 111 if the text field 112 is non-transparent.
(B) is a diagram showing the state of the text field 112 and the electronic document 111 displayed on the monitor when the display mode is set to “transparent”. Since the text field 112 is displayed so as to overlap the electronic document 111, when the text field 112 is transparent, the user can view the electronic document 111 through the transparent text field 112.

A specific method will be described as a mechanism for switching between “non-transparent” and “transparent” in the text field. Assume that the electronic document 111 is a collection of bits consisting of binary values of “0” and “1”, and the text field 112 is a collection of only bit values “0”.
When the display mode is set to “non-transparent”, the application software execution unit of the client calculates the product of each bit of the electronic document 111 and each bit of the text field 112. When the display mode is set to “transparent”, the client application software execution unit calculates the sum of each bit of the electronic document 111 and each bit of the text field 112. The application software execution unit generates a screen to be output to the monitor from the value output as the calculation result.

  In other words, the application software execution unit holds the “product” operator as the operator corresponding to “non-transparent”, and the “sum” operator as the operator corresponding to “transparent”. 18A and 18B can be displayed on the monitor by selecting and calculating an operator corresponding to the attribute (non-transparent or transparent) specified by.

<Summary>
As described above, according to the present invention, when an electronic document file is browsed online, the electronic document can be viewed by transparently displaying the text field arranged on the electronic document. When browsing offline, the electronic document cannot be viewed by displaying the text field arranged on the electronic document in a non-transparent manner.

  In the present embodiment, two file servers, the file server 20 and the file server 30, are provided, and each has a configuration in which different mode control information is embedded in the electronic document file. The mode control information embedded by the file server 30 is a command that enables the electronic document file to be browsed only by the administrator client 60 whether online or offline. On the other hand, if the mode control information embedded by the file server 20 is online, the user client 40 and the user client 50 can view the electronic document file. Is a command that enables browsing.

  Therefore, when the electronic document data 110 generated by the document creation server 10 is output to the file server 20 and the file server 30, the mode control information is embedded in the file server 20 even if the electronic document data 110 is the same. The electronic document file can be browsed by the user client 40 and the user client 50, but the electronic document file in which the mode control information is embedded by the file server 30 cannot be browsed.

In this way, the file server 30 stores all electronic documents created by the document creation server 10 and manages them so that they can be browsed only by the administrator client 60. Even when the server 20 is stopped, the administrator can browse all electronic documents online or offline.
<Other variations>
Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments, and the following cases are also included in the present invention.

(1) The electronic document in the above embodiment is obtained by converting technical data into a PDF (Portable Document Format) file format. However, the electronic document of the present invention is not limited to this.
(2) In the above embodiment, the document creation server 10 that creates an electronic document, and the file server 20 or the file server 30 that embeds mode control information in the created electronic document, creates a file, and manages the created file. However, the present invention is not limited to this, and the document creation server 10 and the file server 20 or the file server 30 are realized by a single computer system. Are also included in the present invention.

(3) In the above embodiment, the file server 20 and the file server 30 have a configuration realized by independent computer systems. However, in the present invention, the file server 20 and the file server 30 are integrated with each other. A configuration realized by one computer system is also included in the present invention.
(4) In the above embodiment, the text field is arranged so as to cover the entire electronic document and hides the entire electronic document. However, the present invention is not limited to this, and the text field is not limited thereto. However, the present invention includes a configuration in which a part of the electronic document is arranged so as to cover a part of the electronic document and the part of the electronic document in which the text field is arranged is concealed.

  (5) Moreover, in the file server 20 and the file server 30, the part which hides an electronic document in a text field may be changed. For example, an electronic document managed by the file server 20 may be configured to cover the entire electronic document with a text field, and an electronic document managed by the file server 30 may be configured to cover a part of the electronic document with a text field. It is included in the present invention.

  (6) Further, in the user client 40, the user client 50, and the administrator client, the portion where the electronic document is hidden in the text field may be changed. For example, an electronic document displayed on the user client 40 is partially covered with a text field, and an electronic document displayed on the user client 50 is entirely covered with a text field, and the electronic document displayed on the administrator client 60 is displayed. The present invention includes a case where the document is configured not to be covered with the text field.

(7) In the present invention, the mode control information may be an instruction for determining an absolute path of an electronic document file or an instruction for determining a relative path.
(8) In the above embodiment, each client holds a unique device ID, refers to offline information using the device ID, and sets the display mode of the text field to “transparent” or “non-transparent”. However, the present invention is not limited to this, and the user using the client inputs the user ID and password that identify the user, and the input user ID and A configuration in which the display mode is set to “transparent” or “non-transparent” using a password or the like is also included in the present invention. In this case, the offline information may be composed of a user ID, a password, and a viewable time.

  Similarly, the mode control information 224 embedded in the electronic document file in the file server 30 has a configuration in which a device ID unique to the administrator client 60 is determined and a display mode is set based on the determination result. However, the present invention includes a configuration in which an administrator ID for identifying the administrator, a password, and the like are determined instead of the device ID, and the display mode is set based on the determination result.

(9) In the above embodiment, each client has a configuration capable of browsing an electronic document for a predetermined time even when it is offline, but this is not an essential configuration in the present invention.
Even if each client permits browsing only when viewing an electronic document online, and browsing the electronic document offline, the configuration of prohibiting browsing is also included in the present invention. In this case, each client need not hold a unique device ID.

  Further, the application software execution unit of each client does not need to measure browsing time. The application software execution unit performs online processing by processing according to the mode control information included in the electronic document file, whether it is an electronic document file acquired by a browser request or an electronic document file acquired by a display request. Browsing permission and offline browsing can be controlled.

(10) The present invention may be the method described above. Further, the present invention may be a computer program that realizes these methods by a computer, or may be a digital signal composed of the computer program.
The present invention also provides a computer-readable recording medium such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blu-ray Disc). ), Recorded in a semiconductor memory or the like. Further, the present invention may be the computer program or the digital signal recorded on these recording media.

In the present invention, the computer program or the digital signal may be transmitted via an electric communication line, a wireless or wired communication line, a network represented by the Internet, or the like.
The present invention may be a computer system including a microprocessor and a memory, wherein the memory stores the computer program, and the microprocessor operates according to the computer program.

In addition, the program or the digital signal is recorded on the recording medium and transferred, or the program or the digital signal is transferred via the network or the like, and is executed by another independent computer system. It is good.
(11) A configuration in which the above embodiment and the above modification are combined is also included in the present invention.

  The present invention can be used in industries that provide electronic documents to users. For example, a system may be considered in which an electronic document is concealed with a text field before billing processing, and the electronic document can be viewed by making the text field opaque after billing processing.

1 is a configuration diagram showing a configuration of an electronic document browsing system 1. FIG. 2 is a functional block diagram functionally showing the configuration of a document creation server 10. FIG. (A) The data structure of the electronic document data 110 created by the document creation server 10 is shown. (B) An initial state attribute 113 of the text field 112 included in the electronic document data 110 is shown. It is a figure which shows the data structure of the browsing information 120 which the browsing information input part 104 of the document creation server 10 receives. 2 is a functional block diagram functionally showing the configuration of a file server 20. FIG. 3 is a diagram illustrating a data configuration of an electronic document file 210 created by the file server 20. FIG. (A) Data of mode control information 114 embedded in the electronic document file 210. (B) It is a figure which shows the data structure of the offline information 115 added to the electronic document file 210. FIG. 3 is a diagram illustrating a data configuration of an electronic document file 220 created by the file server 30. FIG. 12 is a flowchart showing an operation of electronic document data creation processing in the document creation server 10 and is continued from FIGS. 10 and 11. FIG. 10 is a flowchart showing an operation of electronic document data creation processing in the file server 20 and continues from FIG. 9. FIG. 10 is a flowchart showing an operation of electronic document data creation processing in the file server 30 and continues from FIG. 9. 3 is a functional block diagram functionally showing the configuration of a user client 40. FIG. It is a flowchart which shows operation | movement of the application software execution part 313. It is a figure which shows the data flow in the user client 40 at the time of browsing by online and offline. 7 is a flowchart showing operations of electronic document file browsing processing in the user client 40, the user client 50, and the administrator client 60. (A) It is a flowchart which shows operation | movement of each client when the mode control information 114 is performed. (B) It is a flowchart which shows operation | movement of each client when mode control information 224 is performed. It is a flowchart which shows the operation | movement of the electronic document browsing process of each client in application mode. (A) It is a figure which shows the state of the electronic document file displayed on the display part of each client, when the attribute of a text field is set to "display mode: non-transparent". (B) It is a figure which shows the state of the electronic document file displayed on the display part of each client, when the attribute of a text field is set to "display mode: transparency".

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic document browsing system 10 Document creation server 20 File server 30 File server 40 User client 50 User client 60 Administrator client 70 Intranet 101 Document input part 102 Electronic document creation part 103 Text field creation part 104 Browse information input part 105 Electronic document data output unit 201 Electronic document data input unit 202 Electronic document file generation unit 203 File storage unit 204 Electronic document file reading unit 205 Electronic document file output unit 301 Transmission / reception unit 302 Request reception unit 303 Device ID storage unit 304 Web browser 305 file Acquisition unit 306 Write unit 307 Storage unit 308 HTML interpreter unit 309 Display data creation unit 310 Download unit 311 Write unit 312 Hard disk 313 application software executing unit 314 data transceiver 315 script control unit 316 display data generating unit 317 display control unit 318 input unit 319 monitors

Claims (8)

An acquisition means for acquiring an electronic document file including a first layer in which a document is arranged and a second layer associated so as to cover at least a part of the first layer;
Determining means for determining whether the browsing software for browsing the electronic document file is activated by a browser request output from a web browser or by a human operation not via a web browser ;
When it is determined by the determination means that the activation is performed by a browser request output from the Web browser , the second layer is set to the transparent mode, and it is determined that the activation is performed by a human operation without using the Web browser . A control means for setting the second layer to a non-transparent mode;
A browsing device comprising: a display unit configured to display the second layer on the first layer in accordance with a display mode set by the control unit. An acquisition means for acquiring an electronic document file including a first layer in which a document is arranged and a second layer associated so as to cover at least a part of the first layer;
First determination means for determining whether “http: //” is included in the path of the electronic document file;
Second determination means for determining whether the browsing software for browsing the electronic document file is activated by a browser request output from a web browser or by a human operation without going through a web browser ;
When the determination of the first determination means is affirmative, and the second determination means determines that the first determination means is activated by a browser request output from a Web browser , the second layer is set to a transparent mode. Otherwise, control means for setting the second layer to a non-transparent mode;
A browsing device comprising: a display unit configured to display the second layer on the first layer in accordance with a display mode set by the control unit. The acquisition means determines whether or not “http: //” is included in the path of the electronic document file, and when the determination is affirmative, sets the second layer to the transparent mode. A setting command for setting the second layer to a non-transparent mode and a display command for displaying the second layer on the first layer when the determination result is negative Obtaining the electronic document file;
The first determination means executes the determination instruction,
The control means executes the setting command,
The browsing device according to claim 2, wherein the display unit executes the display command. The browsing device stores first identification information for identifying the browsing device;
The electronic document file includes second identification information for identifying a device permitted to view the electronic document file,
It is determined whether or not the first identification information and the second identification information match, and when the first identification information and the second identification information match, the first determination means and the second determination means Make a decision process
The browsing device according to claim 2, wherein the control unit sets the second layer to a non-transparent mode when the first identification information and the second identification information do not match. The electronic document file includes time information;
The control means includes
Even when it is determined that the browsing software for browsing the electronic document file is started by a human operation without using a web browser , the second layer is set to the transparent mode, and the user starts browsing. The offline control part which sets the said 2nd layer to non-transparent mode is measured when the browsing time which starts is measured, and the measured browsing time corresponds to the said time information. Browsing device. The second layer is set to either a print mode or a non-print mode,
The printing mode indicates printing the second layer in order to make the first layer located below the second layer unprintable;
The browsing apparatus according to claim 2, wherein the non-printing mode indicates that the second layer is not printed in order to enable printing of the first layer located below the second layer. An operation method of a browsing device comprising an acquisition means, a determination means, a control means, and a display means,
Obtaining an electronic document file including a first layer in which the document is arranged and a second layer associated so as to cover at least a part of the first layer by the obtaining unit;
Determining, by the determining means, whether the browsing software for browsing the electronic document file was activated by a browser request output from a web browser or by a human operation not via a web browser ;
When it is determined by the control means that it has been activated by a browser request output from a Web browser , the second layer is set to a transparent mode, and it is determined that it has been activated by a human operation without going through the Web browser If so, setting the second layer to non-transparent mode;
And displaying the second layer on the first layer in accordance with a display form set by the display means. A computer program for use in a browsing apparatus comprising a determination means, a determination means, a control means, and a display means,
Obtaining a digital document file including a first layer in which a document is arranged and a second layer associated so as to cover at least a part of the first layer by the determination unit;
Determining, by the determining means, whether the browsing software for browsing the electronic document file was activated by a browser request output from a web browser or by a human operation not via a web browser ;
By the control means, when it is determined to have been started by the outputted browser requests from a Web browser, it sets the second layer to the transparent mode, is determined to have been activated by human manipulation without using the Web browser If so, setting the second layer to non-transparent mode;
And displaying the second layer on the first layer in accordance with a set display form by the display means.

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