Detection and rendering of endnotes in digital content

• US 10,423,703 B1
• Filed: 06/26/2014
• Issued: 09/24/2019
• Est. Priority Date: 06/26/2014
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Singh, Ashish, Christensen, Robert Hale, Chen, Eric
• Primary Examiner(s): Ries, Laurie A
• Application Number:
  US14/316,371
• Time in Patent Office: 1,916 Days
• CPC Class Codes: G06F 40/134 Hyperlinking
• CPC Class Codes: G06F 40/169 Annotation, e.g. comment data or footnotes

Abstract

Systems, methods, and computer-readable media are disclosed for detecting and rendering endnotes in digital content. A user selection of a link rendered at a first location in digital content may be detected and various filtering criteria may be evaluated to determine whether the link references a second location in the digital content that is associated with endnote content. If the link is determined to reference endnote content, the endnote content may be extracted and rendered in association with a portion of the digital content corresponding to the first location.

Claims

1. A method, comprising:

detecting a user selection of a first link corresponding to a first location in a first portion of digital content;

determining, by one or more computers comprising one or more processors, that the first link points to a second location in a second portion of the digital content;

determining, by the one or more computers, that the second location is associated with a second link that points to a third location;

determining, by the one or more computers, that the third location is within a number of locations from the first location within the digital content;

determining, by the one or more computers, that the first location is before the second location in a sequence of locations of the digital content;

determining, by the one or more computers, based at least in part on the third location being within the number of locations from the first location and the first location being before the second location, that the second location is associated with endnote content referenced by the first link and at least partially concurrently with a rendering of at least the first portion; and

rendering, by the one or more computers, at least a portion of the endnote content as an overlay over the at least the first portion that has been rendered.

2. The method of claim 1, further comprising:

converting, by the one or more computers, a plurality of byte positions representing a single character to a corresponding fourth location for display,

wherein the third location is different from the first location based at least in part on converting the plurality of byte positions to the fourth location.

3. The method of claim 1, further comprising:

determining that a number of consecutive links associated with the first location, and at least one location offset from the first location by a first offset value, meets or exceeds a first threshold value, wherein determining that the second location is associated with the endnote content referenced by the first link is further based at least in part on the number of consecutive links associated with the first location and the at least one location offset from the first location meeting or exceeding the first threshold value;

or

determining that a number of consecutive links associated with the second location, and at least one location offset from the second location by a second offset value, meets or exceeds a second threshold value, wherein determining that the second location is associated with the endnote content referenced by the first link is further based at least in part on the number of consecutive links associated with the second location and the at least one location offset from the second location meeting or exceeding the second threshold value.

4. The method of claim 1, further comprising identifying the endnote content, wherein identifying the endnote content comprises:

initiating extraction of the endnote content at the second location;

determining, by the one or more computers, that a halt condition is satisfied, wherein the halt condition indicates that an end of the endnote content has been reached or that a character extraction limit has been reached; and

halting, by the one or more computers, extraction of the endnote content responsive, at least in part, to determining that the halt condition is satisfied,

wherein the at least a portion of the endnote content is rendered responsive, at least in part, to halting of the extraction of the endnote content.

5. A method, comprising:

determining, by one or more computers comprising one or more processors and at least partially concurrently with a rendering of a first portion of digital content, that a first link corresponding to a first location in the first portion points to a second location in a second portion of the digital content, wherein the second portion is associated with a second link that points to a third location;

determining, by the one or more computers, that the third location is within a number of locations from the first location within the digital content; and

determining, by the one or more computers, that the first location is before the second location in a sequence of locations of the digital content; and

determining, by the one or more computers, based at least in part on the third location being within the number of locations from the first location within the digital content and the first location being before the second location that the second location is associated with endnote content.

6. The method of claim 5, wherein the third location is the first location, and wherein the first link and the second link form a cyclic link.

7. The method of claim 5, further comprising determining, by the one or more computers, that the first location is assigned a first value that is less than a second value assigned to the second location, wherein determining that the second location is associated with endnote content is further based at least in part on the first value being less than the second value.

8. The method of claim 5, further comprising determining, by the one or more computers, that a number of consecutive links corresponding to at least the first location does not meet or exceed a threshold value, wherein determining that the second location is associated with endnote content is further based at least in part on the number of consecutive links not meeting or exceeding the threshold value.

9. The method of claim 5, further comprising determining that a number of consecutive links corresponding to at least the second location does not meet or exceed a threshold value, wherein determining that the second location is associated with endnote content is further based at least in part on the number of consecutive links not meeting or exceeding the threshold value.

10. The method of claim 5, further comprising determining, by the one or more computers, that the first location is not included within a predetermined range of locations in the digital content, wherein the predetermined range of locations includes content associated with a table of contents of the digital content, wherein determining that the second location is associated with endnote content is further based at least in part on the first location not being included within the predetermined range of locations.

11. The method of claim 5, further comprising determining, by the one or more computers, that the first location is assigned a first value that is greater than a second value assigned to a content consumption start location, wherein determining that the second location is associated with endnote content is further based at least in part on the first value being greater than the second value.

12. The method of claim 5, further comprising determining, by the one or more computers, that the second location does not correspond to a start location of a particular section of the digital content, wherein determining that the second location is associated with endnote content is further based at least in part on the second location not corresponding to the start location.

13. The method of claim 5, wherein the endnote content is first endnote content, the method further comprising:

determining, by the one or more computers, that a third link corresponding to a third location and a fourth link corresponding to a fourth location are related links, wherein the fourth link points to a fifth location;

determining that the fifth location is not within a number of locations from the third location; and

determining, by the one or more computers, based at least in part on the fifth location not being within the number of locations from the third location, that the fourth location is not associated with second endnote content.

14. The method of claim 13, further comprising determining, by the one or more computers, that a third value assigned to the third location is greater than a fourth value assigned to the fourth location, wherein determining that the fourth location is not associated with second endnote content is further based at least in part on the third value being greater than the fourth value.

15. The method of claim 13, further comprising determining, by the one or more computers, that a number of links corresponding to at least the third location meets or exceeds a first threshold value, wherein determining that the fourth location is associated with second endnote content is further based at least in part on the number of links corresponding to at least the third location meeting or exceeding the first threshold value, or determining, by the one or more computers, that a number of links corresponding to at least the fourth location meets or exceeds a second threshold value, wherein determining that the fourth location is associated with second endnote content is further based at least in part on the number of links corresponding to at least the fourth location meeting or exceeding the second threshold value.

16. The method of claim 15, wherein determining that the number of links corresponding to at least the third location meets or exceeds the first threshold value comprises determining that the third link is included in a table of contents of the digital content, and wherein determining that the number of links corresponding to at least the fourth location meets or exceeds the second threshold value comprises determining that the second link is included in an index of the digital content.

17. The method of claim 5, wherein the portion of the digital content comprises at least a portion of the endnote content or content that includes the first link.

18. The method of claim 5, further comprising:

responsive to determining that the second location is associated with the endnote content, identifying, by the one or more computers, the endnote content and initiating, by the one or more computers, a rendering of at least a portion of the endnote content in an overlay over the existing rendered content.

19. The method of claim 5, wherein determining that the third location is within the number of locations from the first location within the digital content comprises:

determining the number of locations; and

determining that the number of locations is less than a location threshold associated with the number of locations, and wherein the third location precedes the second location.

20. A device, comprising:

at least one processor; and

at least one memory storing computer-executable instructions that, when executed by the at least one processor, cause the at least one processor to;

determine, at least partially concurrently with a rendering of a first portion of digital content, that a first link corresponding to a first location in the first portion points to a second location in a second portion of the digital content, wherein the second portion is associated with a second link that points to a third location;

determine that the third location is within a number of locations from the first location in the first portion within the digital content; and

determine that the first location is before the second location in a sequence of locations of the digital content; and

determine, based at least in part on the third location being within the number of locations from the first location within the digital content and the first location being before the second location that the second location is associated with endnote content that is eligible for rendering in connection with existing rendered content.

21. The device of claim 20, wherein the computer-executable instructions, when executed by the at least one processor, further cause the at least one processor to:

initiate extraction of the endnote content at the second location;

determine that a halt condition is satisfied during extraction of the endnote content;

halt extraction of the endnote content responsive to determining that the halt condition is satisfied; and

render at least a portion of the endnote content.

22. The device of claim 21, wherein, the computer-executable instructions, when executed by the at least one processor, cause the at least one processor to determine that the halt condition is satisfied by:

determining that a third link encountered during the extraction of the endnote content forms part of a pair of related links;

determining that a page break has been encountered during the extraction of the endnote content;

or

determining that a new section of the digital content has been encountered during the extraction of the endnote content.