Information processing device and non-transitory computer readable medium

1. An information processing device comprising:

a processor programmed to:

search a document for a predetermined keyword;

search the document for a referral character string that is within a first predetermined physical range of the predetermined keyword;

search the document for a second instance of the referral character string, the searching of the document including at least searching of a second page different from a first page in which the keyword and the referral character string are first located, the second page being a subject of referral of the referral character string;

on the page that the second instance of the referral character string was found, determine whether, on the second page, an additional instance of the predetermined keyword is present;

upon locating the additional instance of the predetermined keyword on the second page, search a predetermined physical range of the additional predetermined keyword for target information; and

extract and display the target information onto a display screen.

2. The information processing device according to claim 1 , wherein:

the predetermined keyword is a first keyword and the physical range is a first range; and

the processor is programmed to extract the target information indicated by the character string by:

detecting a second keyword corresponding to the first keyword by using pattern matching; and

extracting the target information from a second range determined on a basis of a position of the second keyword.

3. The information processing device according to claim 2 , wherein the processor is programmed to:

detect a title of each of at least one page different from a page on which the predetermined keyword is recorded from among a plurality of pages included in the document; and

extract the target information from a title corresponding to the character string from among the detected titles.

4. The information processing device according to claim 2 , wherein the processor is programmed to change the document such that the extracted target information is displayed in association with the predetermined keyword.

5. The information processing device according to claim 2 , wherein the processor is programmed to:

determine whether a plurality of target information candidates corresponding to the predetermined keyword are recorded in a reference to the target information; and

upon a determination that the plurality of target information candidates corresponding to the predetermined keyword are recorded in the reference, extract the target information by extracting target information selected from among the plurality of target information candidates.

6. The information processing device according to claim 5 , wherein

the plurality of target information candidates are recorded in a plurality of references indicated by the character string; and

the processor is programmed to add, to the character string, a link to the reference in which the selected target information is recorded from among the plurality of references.

7. The information processing device according to claim 1 , wherein the predetermined physical range extends in a predetermined direction from a physical position of the keyword, the predetermined direction being one of up, down, left and right.

8. The information processing device according to claim 1 , wherein the search the document for a second instance of the referral character string includes, at least searching of a second page different from a first page in which the keyword and the referral character string are first located, and of a third page different from the second page and the first page, the second page and the third page each being a subject of referral of the referral character string.

9. The information processing device according to claim 1 , wherein the processor is programmed to:

detect a title of each of at least one page different from a page on which the predetermined keyword is recorded from among a plurality of pages included in the document; and

extract the target information from a title corresponding to the character string from among the detected titles.

10. The information processing device according to claim 9 , wherein the processor is programmed to change the document such that the extracted target information is displayed in association with the predetermined keyword.

11. The information processing device according to claim 9 , wherein the processor is programmed to:

determine whether a plurality of target information candidates corresponding to the predetermined keyword are recorded in a reference to the target information; and

upon a determination that the plurality of target information candidates corresponding to the predetermined keyword are recorded in the reference, extract the target information by extracting target information selected from among the plurality of target information candidates.

12. The information processing device according to claim 11 , wherein

the plurality of target information candidates are recorded in a plurality of references indicated by the character string; and

the processor is programmed to add, to the character string, a link to the reference in which the selected target information is recorded from among the plurality of references.

13. The information processing device according to claim 1 , wherein the processor is programmed to change the document such that the extracted target information is displayed in association with the predetermined keyword.

14. The information processing device according to claim 13 , wherein the processor is programmed to add a link to a reference to the character string.

15. The information processing device according to claim 1 , wherein the processor is programmed to:

determine whether a plurality of target information candidates corresponding to the predetermined keyword are recorded in the a reference to the target information; and

upon a determination that the plurality of target information candidates corresponding to the predetermined keyword are recorded in the reference, extract the target information by extracting target information selected from among the plurality of target information candidates.

16. The information processing device according to claim 15 , wherein the processor is configured to:

cause the display to display a screen that allows a user to select the target information from among the plurality of target information candidates; and

extract the target information by:

receiving the selection of the target information; and

extracting the selected target information.

17. The information processing device according to claim 16 , wherein

the plurality of target information candidates are recorded in a plurality of references indicated by the character string; and

the processor is programmed to add, to the character string, a link to the reference in which the selected target information is recorded from among the plurality of references.

18. The information processing device according to claim 15 , wherein the processor is programmed to:

decide confidence levels of the plurality of target information candidates; and

extract the target information by selecting the target information from among the plurality of target information candidates according to the confidence levels.

19. The information processing device according to claim 15 , wherein

the plurality of target information candidates are recorded in a plurality of references indicated by the character string; and

the processor is programmed to add, to the character string, a link to the reference in which the selected target information is recorded from among the plurality of references.

20. A non-transitory computer readable medium storing a program causing a computer to execute a process for processing information, the process comprising:

searching a document for a predetermined keyword;

searching the document for a referral character string that is within a first predetermined physical range of the predetermined keyword;

searching the document for a second instance of the referral character string, the searching of the document including at least searching of a second page different from a first page in which the keyword and the referral character string are first located, the second page being a subject of referral of the referral character string;

on the page that the second instance of the referral character string was found, determine whether, on the second page, an additional instance of the predetermined keyword is present;

upon locating the additional instance of the predetermined keyword on the second page, searching a predetermined physical range of the additional predetermined keyword for target information; and

extracting and displaying the target information onto a display.