JP2020057194A - Document searching server, document searching system and document searching method - Google Patents

Abstract

To provide a document searching server, a document searching system and a document searching method capable of performing a fine document search that determines whether a description in searched document information is generally described in a positive context or in a negative context with regard to a search keyword.SOLUTION: A document searching server includes: a search condition input process unit 51 that receives an input search condition containing at least a search keyword and a negative/positive ratio which is a ratio between positive parts and negative parts of a description containing the search keyword in document information; a document searching unit 52 that searches the document information which matches the document search condition; and a display process unit 53 that performs a process of displaying, on a display unit, the document information searched by the document searching unit 52 and information relating to the document information.SELECTED DRAWING: Figure 2

Description

  According to the present invention, it is possible to easily perform a detailed sentence search whether a description in document information is described in a context that is entirely positive or negative for a search keyword. The present invention relates to a document search server, a document search system, and a document search method that can be performed.

  2. Description of the Related Art Conventionally, there is a document search device that searches for desired document information from a large number of document information such as documents by using a search keyword and displays a list (for example, see Patent Document 1).

JP 2013-41385 A

  However, in the conventional document search apparatus, even if document information such as a document that matches the search keyword can be searched, the content of the document information is in a positive (positive or related) context with respect to the search keyword. There is a problem that it is difficult to easily perform a detailed sentence search whether the description is described or in a negative (negative or unrelated direction) context. This difficulty is that even if it is possible to judge a positive context and a negative context (negative / positive judgment) for each context in one piece of document information, a positive Because contexts and negative contexts may be mixed, simple narrowing-down classification cannot be performed to determine whether one piece of document information is positive document information or negative document information for a search keyword. .

  The present invention has been made in order to solve the above-described problems of the related art, and is described in a manner that a description in document information is described in a positive context as a whole with respect to a search keyword or in a negative context. An object of the present invention is to provide a document search server, a document search system, and a document search method capable of easily performing a detailed sentence search as to whether a document is described.

  In order to solve the above problems, the present invention is a document search server that searches for document information that matches a search condition from a plurality of pieces of document information, and includes a search keyword and the search keyword in the document information. A search condition input processing unit for receiving an input of a search condition including at least a negative / positive ratio in which the description includes a ratio of a positive portion to a negative portion; a document search unit for searching for the document information matching the search condition; A display processing unit that performs a process of displaying the document information retrieved by the retrieval unit and the information related to the document information on the display unit.

  Further, according to the present invention, in the above invention, the document search unit extracts document information that matches a ratio in a predetermined range around the input negative / positive ratio as document information that matches the negative / positive ratio. And

  Further, according to the present invention, in the above invention, the display processing unit performs processing for displaying a list of document information corresponding to the negative / positive ratio, and a document information selected from the list of document information. And a content display processing unit that performs a process of displaying the content of the content.

  Further, according to the present invention, in the above-mentioned invention, the content display processing section performs different highlighting on the positive portion and the negative portion.

  Further, according to the present invention, in the above invention, a process of displaying a page-by-page distribution transition of a negative / positive ratio in a page unit with respect to a page in the document information selected from the list of the document information and displayed by the content display processing unit. And a distribution transition display processing unit for each page.

  Also, in the present invention according to the above invention, the content display processing section displays a display page displayed by the content display processing section by selecting a page position for the page-based distribution transition displayed by the page-based distribution transition display processing section. Is moved to the selected page.

  Further, in the present invention according to the above invention, the search condition input processing unit receives an input of a search condition including at least a search keyword and document information including the positive part or the negative part, The display processing unit performs a process of displaying a number distribution of the document information with respect to a change in the negative / positive ratio, for document information that matches a search condition that the document information includes the positive part or the negative part. Features.

  Further, the present invention is characterized in that, in the above invention, the search condition input processing unit is a slider component capable of variably inputting the negative / positive ratio.

  Further, the present invention includes the document search server according to any one of the above inventions, and a terminal device connected to the document search server via a network, wherein the terminal device includes various types including the search condition. An input unit for inputting information and a display unit for displaying the content of the display processing by the display processing unit are provided.

  Further, the present invention is a document search method for searching for document information that matches a search condition from a plurality of pieces of document information, wherein a search keyword and a description including the search keyword in the document information are a positive part. A search condition input step of inputting a search condition including at least a negative / positive ratio which is a ratio to a negative portion; a document search step of searching for the document information matching the search condition; and the document information searched by the document search step And a display step of displaying information related to the document information.

  Further, according to the present invention, in the above-mentioned invention, the document search step extracts document information matching a ratio in a predetermined range around the input negative-positive ratio as document information matching the negative-positive ratio. And

  Further, in the present invention according to the above invention, the display step displays a list of document information corresponding to the negative / positive ratio, and displays the content of the document information selected from the list of document information. And a content display step.

  Also, the present invention is characterized in that, in the above invention, the content display step performs different emphasis display on the positive portion and the negative portion.

  Further, according to the present invention, in the above-described invention, the page-by-page distribution transition of the negative / positive ratio per page with respect to the page in the document information selected and displayed from the list of document information is displayed.

  Further, according to the present invention, in the above invention, the content display step moves a display page to the selected page by selecting a page position for the page-by-page distribution transition.

  Further, in the present invention according to the above invention, the search condition input step receives an input of a search condition including at least a search keyword and document information including the positive part or the negative part, and the display The step is characterized in that, for document information that matches a search condition that the document information includes the positive portion or the negative portion, a process of displaying a number distribution of the document information with respect to the change in the negative / positive ratio is performed. I do.

  Further, the invention is characterized in that, in the above invention, the search condition input step inputs the ratio on a slider component capable of variably inputting the negative / positive ratio.

  According to the present invention, it is possible to easily perform a detailed sentence search as to whether a description in document information is described in a context entirely positive or negative for a search keyword. be able to.

FIG. 1 is an explanatory diagram for explaining the outline of the document search system including the document search server according to the present embodiment. FIG. 2 is a functional block diagram showing a configuration of a document search system including the document search server shown in FIG. FIG. 3 is a functional block diagram showing a configuration of the terminal device shown in FIG. FIG. 4 is a flowchart illustrating a document search processing procedure performed by the control unit. FIG. 5 is a diagram illustrating an example of a display accompanying the document search process. FIG. 6 is a diagram illustrating another example of the display associated with the document search process. FIG. 7 is a flowchart illustrating a modification of the document search processing procedure performed by the control unit.

  Hereinafter, preferred embodiments of a document search server, a document search system, and a document search method according to the present invention will be described in detail with reference to the accompanying drawings.

<Overview of Document Search System>
First, an outline of the document search system according to the present embodiment will be described. FIG. 1 is an explanatory diagram illustrating an outline of a document search system including a document search server 10 according to the present embodiment.

  As shown in FIG. 1, in this document search system, a terminal device 60 is connected to a document search server 10. The terminal device 60 is, for example, a personal computer handled by a document search requester who handles academic documents and the like in a pharmaceutical company. First, from the terminal device 60, the document search requester determines that the search keyword and the description including the search keyword in the document information are positive (positive or related) and negative (negative or unrelated). A search condition including at least a negative / positive ratio which is a ratio with a part is uploaded to the document search server 10 (step S1).

  Here, “a description including a search keyword is positive” means that, for example, when there is a search keyword “diabetic male side effect”, a search keyword other than the last (diabetic male) is the last search keyword (side effect). Means positively acting. In other words, a case in which side effects occur in men with diabetes is positive. On the other hand, “the description including the search keyword is negative” means that, for example, when there is a search keyword “diabetic male side effect”, a search keyword other than the last (diabetic male) becomes the last search keyword (side effect) Means the case of acting negatively. In other words, a case in which no side effect occurs in men with diabetes is negative.

The document search server 10 searches for document information that matches the received search condition, sends the searched document information and information related to the document information to the terminal device 60 as a search result, and displays the information on the display unit of the terminal device 60. (Step S2). Here, the document search server 10 extracts document information that matches a ratio in a predetermined range around the input negative / positive ratio as document information that matches the negative / positive ratio. For example, the negative / positive ratio R is expressed as follows, where P is the number of positive portions and N is the number of negative portions.
R = (PN) / (P + N)
Can be expressed as In addition, the negative / positive ratio R can be expressed as a percentage. For example, when the number P of the positive portions is 3 and the number N of the negative portions is 1, R = ２ = 0.5, and the negative / positive ratio R is + 50%. Conversely, when the number P of the positive portions is 1 and the number N of the negative portions is 3, R = −0.5, and the negative / positive ratio R is −50%.

  Further, since only one point is specified for the condition of the negative / positive ratio R, when the condition of the negative / positive ratio R is specified, the document search server 10 sets the document information in a predetermined range of the negative / positive ratio R, for example, R ± 10%. Is preferably extracted. When the negative-positive ratio R is specified as 0%, it is assumed that the description of the positive portion and the negative portion always exists. That is, when the negative / positive ratio R is specified as the search condition, the document information in which the description of the positive portion or the negative portion always exists is to be extracted.

  When a search keyword and a negative / positive ratio are input as search conditions, the document search server 10 displays a list of document information that matches the search keyword and the negative / positive ratio. Then, a process of displaying the contents of the document information selected from the list-displayed document information is performed.

  In displaying the contents of the document information, the document search server 10 performs different highlighting on the positive part and the negative part. By performing this highlighting, it is possible to quickly grasp the description portions of the positive portion and the negative portion.

  Further, the document search server 10 performs a process of displaying the page-by-page distribution transition of the negative / positive ratio in the page unit with respect to the page in the document information selected and displayed from the list display of the document information. This makes it possible to easily grasp the page transition between the description of the positive part and the description of the negative part in the document information.

  Here, by selecting the page position with respect to the page-by-page distribution transition, the displayed page is moved from the displayed content page to the selected page. Thereby, the page of interest can be displayed quickly.

  Instead of specifying the negative / positive ratio, all the document information having the description of the positive portion or the negative portion may be extracted. In this case, a process of displaying the number distribution of the document information with respect to the change of the negative / positive ratio may be performed on the extracted document information.

  In this manner, in the present embodiment, the negative / positive ratio can be specified as a search condition, so that the description in the document information is described in a context that is entirely positive with respect to the search keyword, Fine-grained document retrieval can be performed as if it were described in context.

<Configuration of document search server>
Next, the configuration of the document search server 10 shown in FIG. 1 will be described. FIG. 2 is a functional block diagram showing a configuration of the document search system including the document search server 10 shown in FIG. A terminal device 60 is connected to the document search server 10 via a network N. The document search server 10 includes an input / output unit 20, a communication unit 30, a storage unit 40, and a control unit 50.

  The input / output unit 20 is an input / output interface such as a touch panel display for performing various operation inputs and display outputs. The communication unit 30 is a communication interface for communicating with the terminal device 60 via the network N.

  The storage unit 40 is a storage device including a hard disk device and a nonvolatile memory, and stores the document information 41 and the document attribute information 42.

  The control unit 50 is a control unit that controls the entire document search server 10, and includes a search condition input processing unit 51, a document search unit 52, and a display processing unit 53. The control unit 50 stores programs corresponding to these functional units in a storage device such as a non-volatile memory or a magnetic disk device, loads these programs into the memory, and executes the programs by the CPU. Will run the process.

  The search condition input processing unit 51 receives, from the terminal device 60 via the communication unit 30, the search keyword and the description including the search keyword in the document information 41 includes at least a negative / positive ratio in which the ratio between the positive portion and the negative portion is included. Accept search condition input. Also, the search condition input processing unit 51 accepts, as a search condition, document information including a positive portion or a negative portion.

  The document search unit 52 searches for the document information 41 that matches the received search condition. When performing a quick search of the document information 41, the document search unit 52 searches using the document attribute information 42 for the document information 41. This is because it takes time to search the entire contents of the document information 41.

  The display processing unit 53 performs a process of displaying the document information 41 retrieved by the document retrieval unit 52 and information related to the document information 41 on the display unit of the terminal device 60. The display processing unit 53 includes a list display processing unit 54, a content display processing unit 55, a distribution display processing unit 56, and a page-based distribution transition display processing unit 57.

  The list display processing unit 54 performs a process of displaying a list of the document information 41 corresponding to the negative / positive ratio R. Further, the content display processing unit 55 performs a process of displaying the content of the document information 41 selected from the list of the document information 41. The content display processing unit 55 performs different highlighting on the positive part and the negative part. For example, a character or region is highlighted in blue or green in a positive portion, and a character or region is highlighted in red in a negative portion.

  The distribution display processing unit 56 performs a process of displaying the number distribution of the document information 41 with respect to the change in the negative / positive ratio R for the document information 41 that matches the search condition that the document information includes a positive portion or a negative portion. .

  The page-by-page distribution transition display processing section 57 performs a process of displaying the page-by-page distribution transition of the negative / positive ratio in page units with respect to the pages in the document information selected and displayed from the list of document information.

<Configuration of terminal device>
Next, the configuration of the terminal device 60 shown in FIG. 2 will be described. FIG. 3 is a functional block diagram showing a configuration of the terminal device 60 shown in FIG. The terminal device 60 includes an input unit 61, a display unit 62, a communication unit 63, a storage unit 64, and a control unit 65.

  The input unit 61 is an input device such as a keyboard or a mouse, the display unit 62 is a display device such as a liquid crystal panel, and the communication unit 63 is a communication interface unit for connecting to the document search server 10. The input unit 61 and the display unit 62 may be an integrated input / output unit using, for example, a touch panel display. Further, the terminal device 60 may be a mobile terminal device.

  The storage unit 64 is a storage device including a hard disk device and a non-volatile memory, and stores the document information 41, the document attribute information 42, and the like.

  The control unit 65 is a control unit that controls the entire terminal device 60, and includes a search request processing unit 66. The control unit 65 stores a program corresponding to the functional unit in a storage device such as a nonvolatile memory or a magnetic disk device, loads the program into the memory, and executes the program by the CPU to execute a corresponding process. Will be executed.

  The search request processing unit 66 performs a process of transmitting the search condition received by the input unit 61 to the document search server 10, receiving the search result of the document search server 10, and displaying the search result on the display unit 62.

<Document search processing>
Next, a document search processing procedure performed by the control unit 50 will be described. FIG. 4 is a flowchart illustrating a document search processing procedure performed by the control unit 50. As shown in FIG. 4, first, the search condition input processing unit 51 receives a search keyword and a search condition including a negative-positive ratio (step S101). After that, the document search unit 52 performs a process of searching for the document information 41 that matches the received search condition (Step S102). Then, the list display processing unit 54 displays a list of the searched document information (step S103).

  Thereafter, the display processing unit 53 determines whether or not one piece of document information 41 is selected from the list-displayed document information 41 (Step S104). If the document information 41 has not been selected (Step S104; No), the process proceeds to Step S111. On the other hand, if the document information 41 has been selected (step S104; Yes), the content of the selected document information 41 is displayed and the portion that has been determined to be negative / positive is highlighted (step S105). Then, the page-by-page distribution transition display processing unit 57 displays the page-by-page distribution transition of the negative / positive ratio in page units with respect to the page in the displayed document information (step S106).

  Thereafter, it is determined whether or not a page on the page-by-page distribution transition has been selected (step S107). If a page is not selected (step S107; No), the process proceeds to step S110. On the other hand, if a page is selected (step S107; Yes), the page is moved from the currently displayed page to the selected page (step S108).

  Thereafter, it is determined whether another page is selected on the page-by-page distribution transition (step S109). If another page is selected (step S109; Yes), the process proceeds to step S108 to display the selected page. On the other hand, if another page is not selected (step S109; No), it is further determined whether another document information 41 is selected from the list display (step S110). If another document information 41 has been selected from the list display (step S110; Yes), the process proceeds to step S105, where the content of the selected document information 41 is displayed and the portion that has been determined as negative / positive is highlighted. On the other hand, if no other document information is selected from the list display (step S110; No), it is determined whether or not there is an end instruction (step S111). If there is no end instruction (Step S111; No), the process proceeds to Step S101 and the above processing is repeated. On the other hand, if there is a termination instruction (Step S111; Yes), this processing is terminated.

<Example of display in document search processing>
Next, an example of display in the document search process will be described. FIG. 5 is a diagram illustrating an example of a display accompanying the document search process. As shown in FIG. 5A, the search condition input processing unit 51 displays an input field for a search keyword in the display area E1 of the display unit 62, and searches for diabetes, men, and side effects, for example, input in the input field. Accept keywords.

  Further, as shown in FIG. 5B, the search condition input processing unit 51 displays a slider SR1 which is a GUI negative / positive component on which a variable input of the negative / positive ratio can be easily performed on the display unit 62. Then, by moving the slider button B1 to a desired position, the negative / positive ratio R corresponding to the moved position can be designated as a search condition. In FIG. 5B, the negative / positive ratio R = + 25% is selected.

  Here, documents A to D as document information 41 matching the negative / positive ratio R specified by the slider button B1 are displayed in a list on the display area E2 of the display unit 62. When the document A is selected from the list display as shown in FIG. 5C, the contents of the document A are displayed in the display area E3 of the display unit 62 as shown in FIG. 5D. In this content display, the positive portion (the region indicated by ○) is highlighted in green, and the negative portion (the region indicated by ×) is highlighted in red.

  Further, as shown in FIG. 5E, in the display area near the display area E3 of the content display, a change in the positive ratio in page units due to a change in the page is displayed as a page-by-page distribution transition. On this page-by-page distribution transition, a slider SR2 to which the selection button B2 slides is displayed as a GUI component. By displaying this page-by-page distribution transition, it is possible to easily recognize the distribution of pages having many positive portions or pages having many negative portions in Document A.

  Here, when a desired page is selected with the selection button B2, the currently displayed page is switched to the selected page. As a result, a positive portion or a negative portion in the page of interest can be searched in detail and easily.

<Other examples of display in document search processing>
Next, another example of the display in the document search process will be described. FIG. 6 is a diagram illustrating another example of the display associated with the document search process. As shown in FIG. 6A, similarly to FIG. 5A, the search condition input processing unit 51 displays a search keyword input field in the display area E1 of the display unit 62 and, for example, inputs a search keyword input field to the input field. Also accepts search keywords for diabetes, men, side effects.

  Further, as shown in FIG. 6B, the search condition input processing unit 51 displays an all negative / positive ratio selection button B10. The all negative / positive ratio selection button B10 is a button for designating at least a positive portion or a negative portion as a search condition. When the all negative / positive ratio selection button B10 is selected, the negative / positive ratio R shown in FIG. 6D is associated with the negative / positive ratio R of the slider SR1 to be selected as a search condition, and as shown in FIG. The number distribution of the document information with respect to the change in the ratio R is displayed.

  When the desired negative / positive ratio R is selected with the slider button B1 with reference to the number distribution, a list of documents having the negative / positive ratio corresponding to the selected position is displayed, and the subsequent display processing is the same as that of FIG. is there.

<Modified example of document search process>
Next, a modified example of the document search processing procedure performed by the control unit 50 will be described. FIG. 7 is a flowchart illustrating a modified example of the document search processing procedure performed by the control unit 50. As shown in FIG. 7, first, the search condition input processing unit 51 receives a search keyword and a search condition including at least a positive portion or a negative portion by selecting the all negative / positive ratio selection button B10 (step S201). . Thereafter, the document search unit 52 performs a process of searching for the document information 41 that matches the received search condition (Step S202). Then, the number distribution with respect to the negative / positive ratio shown in FIG. 6C is displayed (step S203). Then, a list of document information having the negative / positive ratio at the current negative / positive ratio position in the number distribution is displayed (step S204). Subsequent processing in steps S205 to S211 performs the same processing as processing in steps S104 to S111. In step S212, it is determined whether to change the negative / positive ratio R (step S212). If the negative / positive ratio R is to be changed (Step S212; Yes), the process proceeds to Step S204 and the above processing is repeated. On the other hand, if the change of the negative / positive ratio R is not performed (Step S212; No), this processing is ended.

  In the above embodiment, the case where the document information 41, the document attribute information 42, and the like are stored in the storage unit 64 of the terminal device 60 has been described. However, the present invention is not limited to this. The information may not be stored in the storage unit 64.

  Further, each configuration illustrated in the above-described embodiment is a schematic function, and does not necessarily need to be physically configured as illustrated. In other words, the form of distribution / integration of each device is not limited to the one shown in the drawing, and all or a part thereof is functionally or physically distributed / integrated in arbitrary units according to various loads and usage conditions. Can be configured.

  In the document search server, the document search system, and the document search method according to the present invention, the description in the document information is described in a positive context or a negative context with respect to the search keyword as a whole. This is useful when you want to perform a fine-grained document search.

Reference Signs List 10 document search server 20 input / output unit 30, 63 communication unit 40, 64 storage unit 41 document information 42 document attribute information 50, 65 control unit 51 search condition input processing unit 52 document search unit 53 display processing unit 54 list display processing unit 55 Content display processing section 56 Distribution display processing section 57 Distribution transition display processing section for each page 60 Terminal device 61 Input section 62 Display section 66 Search request processing section B1 Slider button B10 All negative / positive ratio selection button B2 selection button E1 to E3 Display area N network R Negative / positive ratio SR1, SR2 slider

Further, the present invention is a document search method for searching for document information that matches a search condition from a plurality of pieces of document information, wherein a search keyword and a description including the search keyword in the document information are a positive part. A search condition input step for receiving an input of a search condition including at least a negative / positive ratio which is a ratio to a negative portion; a document search step for searching for the document information matching the search condition; and a document searched by the document search step wherein the information and the document search server and a display step of displaying information related to the document information is performed.

Further, according to the present invention, in the above-mentioned invention, in the document search step, document information matching a ratio in a predetermined range around the negative-positive ratio included in the search condition is extracted as document information matching the negative-positive ratio. It is characterized by the following.

Also, the present invention is characterized in that, in the above invention, the search condition input step receives an input of the ratio on a slider component capable of variably inputting the negative / positive ratio.

Claims (17)

A document search server that searches for document information that matches a search condition from a plurality of document information,
A search keyword, and a search condition input processing unit that receives an input of a search condition in which the description including the search keyword in the document information includes at least a negative / positive ratio that is a ratio between a positive portion and a negative portion;
A document search unit that searches for the document information that matches the search condition;
A display processing unit that performs a process of displaying the document information retrieved by the document retrieval unit and information related to the document information on a display unit.   2. The document search server according to claim 1, wherein the document search unit extracts document information matching a ratio in a predetermined range around the input negative / positive ratio as document information matching the negative / positive ratio. 3. . The display processing unit,
A list display processing unit that performs a process of displaying a list of document information corresponding to the negative / positive ratio;
The document search server according to claim 1, further comprising: a content display processing unit configured to perform a process of displaying a content of the document information selected from the list of the document information.   The document search server according to claim 3, wherein the content display processing unit performs different highlighting on the positive part and the negative part.   A page-by-page distribution transition display processing unit that performs a process of displaying a page-by-page distribution transition of a negative / positive ratio in a page unit with respect to a page in the document information selected from the document information list and displayed by the content display processing unit; 5. The document search server according to claim 3, wherein:   The content display processing unit moves a display page displayed by the content display processing unit to a selected page by selecting a page position for the page-based distribution transition displayed by the page-based distribution transition display processing unit. 6. The document search server according to claim 5, wherein: The search condition input processing unit receives an input of a search condition including at least a search keyword and document information including the positive part or the negative part,
The display processing unit performs a process of displaying the number distribution of the document information with respect to the change in the negative / positive ratio for document information that matches a search condition that the document information includes the positive part or the negative part. The document search server according to any one of claims 1 to 6, wherein:   The document search server according to claim 1, wherein the search condition input processing unit is a slider component capable of variably inputting the negative / positive ratio. A document search server according to any one of claims 1 to 8,
A terminal device connected to the document search server via a network,
The terminal device,
An input unit for inputting various information including the search condition,
A display unit for displaying the content of the display processing by the display processing unit. A document search method for searching for document information that matches a search condition from a plurality of document information,
A search keyword, and a search condition input step of inputting a search condition in which the description including the search keyword in the document information includes at least a negative-positive ratio that is a ratio between a positive portion and a negative portion;
A document search step of searching for the document information matching the search condition;
Displaying the document information retrieved by the document retrieval step and information related to the document information.   11. The document search method according to claim 10, wherein the document search step extracts document information matching a ratio in a predetermined range around the input negative / positive ratio as document information matching the negative / positive ratio. . The displaying step includes:
A list display step of displaying a list of document information corresponding to the negative / positive ratio;
The document search method according to claim 10, further comprising: displaying a content of the document information selected from the list of the document information.   13. The document search method according to claim 12, wherein in the content displaying step, different highlighting is performed on the positive part and the negative part.   14. The document search method according to claim 12, wherein a page-by-page distribution transition of a negative / positive ratio in a page unit with respect to a page in the document information selected and displayed from the list of the document information is displayed.   15. The document search method according to claim 14, wherein, in the content displaying step, a displayed page is moved to a selected page by selecting a page position for the page-by-page distribution transition. The search condition input step accepts an input of a search condition including at least a search keyword and document information including the positive part or the negative part,
The display step includes performing a process of displaying a number distribution of the document information with respect to a change in the negative / positive ratio for document information that matches a search condition that the document information includes the positive portion or the negative portion. The document search method according to any one of claims 10 to 15, wherein:   17. The document search method according to claim 10, wherein in the search condition input step, the ratio is input on a slider component capable of variably inputting the negative / positive ratio.

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