Computer system and method of displaying update status of linked hypertext documents

• US 6,088,707 A
• Filed: 10/06/1997
• Issued: 07/11/2000
• Est. Priority Date: 10/06/1997
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Day, Paul R., Bates, Cary L.
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): TRINH, WILLIAM B
• Application Number:
  US08/944,222
• Time in Patent Office: 1,009 Days
• Field of Search: 707/501, 707/513
• US Class Current: 715/235
• CPC Class Codes: G06F 16/957 Browsing optimisation, e.g. caching or content distillation

Abstract

A computer system and method of displaying hypertext documents indicate an update status for a particular hypertext document in association with the display of a hypertext link definition pointing to that document. In addition, one or more specific notification criteria are utilized to determine when a document has been updated. A notification criteria may be based upon a user selection of a selected portion of a document, such that changes to another portion of the document do not trigger an indication of an updated document. A notification criteria may also be based on a specific keyword search criteria selected by a user. A notification criteria may further be based on a relative change threshold for a document, such that changes to a document falling below the threshold are not indicated to a user. In addition, a notification criteria function may be based upon updates made by a particular author of a document, such that specific authors may either trigger or not trigger notification of an updated document.

Claims

1. A method of displaying a first hypertext document on a computer display, the first hypertext document including at least one hypertext link definition that points to a second hypertext document, the method comprising:

(a) displaying the first hypertext document on the computer display, including displaying the hypertext link definition;

(b) maintaining status information associated with a previous copy of the second hypertext document, wherein the status information associated with the previous copy of the second hypertext document is selected from the group consisting of a checksum, a document size, an author, an area selection within the previous copy of the second hypertext document, a keyword search expression, a numeric expression, a numeric threshold, a keyword list, and combinations thereof;

(c) determining whether the second hypertext document has been updated by comparing status information for the second hypertext document with that of the previous copy of the second hypertext document; and

(d) indicating on the computer display and within the first hypertext document whether the second hypertext document has been updated since a predetermined time.

2. The method of claim 1, wherein the predetermined time is a time in which the second hypertext document was last viewed by a user.

3. The method of claim 1, wherein indicating whether the second hypertext document has been updated includes displaying an updated status indicator proximate the hypertext link definition.

4. The method of claim 3, wherein the updated status indicator includes an icon disposed immediately adjacent the hypertext link definition.

5. The method of claim 1, wherein indicating whether the second hypertext document has been updated includes displaying the hypertext link definition in a predetermined color.

6. The method of claim 1, wherein the status information associated with the previous copy of the second hypertext document further includes at least a portion of the contents of the previous copy.

7. The method of claim 1, wherein maintaining status information includes maintaining a data structure including a plurality of records associated with a plurality of document locations, and wherein indicating whether the second hypertext document has been updated includes:

(a) displaying the hypertext link definition in a first predetermined color if no record in the data structure is associated with the document location of the second hypertext document;

(b) displaying the hypertext link definition in a second predetermined color if a record in the data structure is associated with the document location of the hypertext document but the second hypertext document has not been updated; and

(c) displaying the hypertext link definition in a third predetermined color if a record in the data structure is associated with the document location of the second hypertext document and the second hypertext document has been updated.

8. The method of claim 7, wherein the data structure includes a visited list, and wherein maintaining the data structure includes:

(a) creating a record in the visited list for each document location that is visited by a user; and

(b) maintaining a visited count within each record, the visited count associated with a relative frequency in which the document location has been visited, wherein indicating whether the second hypertext document has been updated includes indicating that the second hypertext document has been updated only if the visited count for the record associated with the second hypertext document exceeds a predetermined threshold.

9. The method of claim 7, wherein each record is associated with a trigger function, and wherein comparing the status information includes executing the trigger function associated with the record for the document location of the second hypertext document.

10. The method of claim 9, wherein the trigger function is selected from the group consisting of a selection trigger function, a keyword trigger function, an author trigger function, a numeric trigger function, a percentage trigger function, a checksum trigger function, and combinations thereof.

11. The method of claim 1, further comprising, in response to user input, selectively displaying the status information associated with the previous copy of the second hypertext document.

12. A computer system, comprising:

(a) a computer display; and

(b) a processor, coupled to the computer display and configured to display on the computer display a first hypertext document including at least one hypertext link definition that points to a second hypertext document, the processor further configured to maintain status information associated with a previous copy of the second hypertext document, determine whether the second hypertext document has been updated by comparing status information for the second hypertext document with that of the previous copy of the second hypertext document, and to indicate within the first hypertext document whether the second hypertext document has been updated since a predetermined time, wherein the status information associated with the previous copy of the second hypertext document is selected from the group consisting of a checksum, a document size, an author, an area selection within the previous copy of the second hypertext document, a keyword search expression, a numeric expression, a numeric threshold, a keyword list, and combinations thereof.

13. The computer system of claim 12, wherein the predetermined time is a time in which the second hypertext document was last viewed by a user.

14. The computer system of claim 12, wherein the processor is configured to display an updated status indicator proximate the hypertext link definition.

15. The computer system of claim 14, wherein the updated status indicator includes an icon disposed immediately adjacent the hypertext link definition.

16. The computer system of claim 12, wherein the processor is further configured to display the hypertext link definition in a predetermined color.

17. The computer system of claim 12, further comprising a memory, coupled to the processor and configured to store a data structure including a plurality of records associated with a plurality of document locations, wherein the processor is further configured to:

(a) display the hypertext link definition on the computer display in a first predetermined color if no record in the data structure is associated with the document location of the second hypertext document;

(b) display the hypertext link definition on the computer display in a second predetermined color if a record in the data structure is associated with the document location of the hypertext document but the second hypertext document has not been updated; and

(c) display the hypertext link definition on the computer display in a third predetermined color if a record in the data structure is associated with the document location of the second hypertext document and the second hypertext document has been updated.

18. The computer system of claim 17, wherein the data structure includes a visited list, and wherein the processor is further configured to:

(a) create a record in the visited list for each document location that is visited by a user;

(b) maintain a visited count within each record, the visited count associated with a relative frequency in which the document location has been visited; and

(c) indicate that the second hypertext document has been updated only if the visited count for the record associated with the second hypertext document exceeds a predetermined threshold.

19. The computer system of claim 17, wherein each record is associated with a trigger function, and wherein the processor is further configured to execute the trigger function associated with the record for the document location of the second hypertext document.

20. The computer system of claim 19, wherein the trigger function is selected from the group consisting of a selection trigger function, a keyword trigger function, an author trigger function, a numeric trigger function, a percentage trigger function, a checksum trigger function, and combinations thereof.

21. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document further includes at least a portion of the contents of the previous copy.

22. The computer system of claim 12, wherein the processor is further configured to, in response to user input, selectively display the status information associated with the previous copy of the second hypertext document.

23. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes a checksum.

24. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes a document size.

25. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes an author.

26. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes an area selection within the previous copy of the second hypertext document.

27. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes a keyword search expression.

28. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes a numeric expression.

29. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes a numeric threshold.

30. The computer system of claim 12, wherein the status information associated with the previous copy of the second hypertext document includes a keyword list.

31. A program product, comprising:

(a) a program configured to perform a method of displaying a first hypertext document on a computer display, the first hypertext document including at least one hypertext link definition that points to a second hypertext document, the method comprising;

(1) displaying the first hypertext document on the computer display, including displaying the hypertext link definition;

(2) maintaining status information associated with a previous copy of the second hypertext document, wherein the status information associated with the previous copy of the second hypertext document is selected from the group consisting of a checksum, a document size, an author, an area selection within the previous copy of the second hypertext document, a keyword search expression, a numeric expression, a numeric threshold, a keyword list, and combinations thereof;

(3) determining whether the second hypertext document has been updated by comparing status information for the second hypertext document with that of the previous copy of the second hypertext document; and

(4) indicating on the computer display and within the first hypertext document whether the second hypertext document has been updated since a predetermined time; and

(b) a signal bearing media bearing the program.

32. The program product of claim 31, wherein the signal bearing media is transmission type media.

33. The program product of claim 31, wherein the signal bearing media is recordable media.

34. A computer-implemented method of monitoring an update status of a document, the method comprising:

(a) in response to user selection of a selected section of a document extending between at least one set of start and end positions in the document, generating a notification criteria for the document;

(b) retrieving data associated with at least the selected section of a current copy of the document;

(c) analyzing the retrieved data to determine if the current copy of the document matches the notification criteria; and

(d) if the current copy of the document matches the notification criteria, notifying a user that the document has been updated.

35. The method of claim 34, further comprising storing reference data associated with a previous copy of the document, wherein analyzing the retrieved data includes comparing the retrieved data with the reference data, and wherein the reference data includes the contents of the previous copy of the document within the selected section specified in the notification criteria.

36. The method of claim 34, wherein generating the notification criteria is responsive to user highlighting information between the start and end positions in the document using a mouse.

37. The method of claim 34, wherein the notification criteria excludes the selected section of the document.

38. The method of claim 34, wherein generating the notification criteria is responsive to user input of a content delimiter that defines the start and end positions of the selected section, the content delimiter selected from the group consisting of a format, a tag, a style, a type, a token, an object definition, and combinations thereof.

39. The method of claim 34, wherein the notification criteria further includes a threshold value, wherein analyzing the retrieved data includes comparing a data value in the retrieved data to the threshold value.

40. The method of claim 34, wherein the notification criteria further includes a numeric expression, wherein analyzing the retrieved data includes operating on a data value in the retrieved data with the numeric expression.

41. The method of claim 40, further comprising analyzing reference data associated with a previous copy of the document, including operating on a data value from the reference data with the numeric expression, wherein analyzing the retrieved data further includes comparing results of the operations on the data values from the retrieved and reference data to determine if the current copy of the document has been updated.

42. The method of claim 34, further comprising:

(a) storing the notification criteria for the document in a record in a data structure, including storing a trigger function in the record, the trigger function returning the update status of the document based upon the notification criteria therefor;

(b) storing reference data in the record, the reference data associated with a previous copy of the document; and

(c) storing a trigger data function in the record, the trigger data function storing data associated with the current copy of the document in the reference data in the record.

43. The method of claim 42, further comprising storing a trigger status function in the record, the trigger status function returning statistics associated with an update status of the document.

44. The method of claim 43, wherein the data structure includes a plurality of records, each associated with a tracked document, the method further comprising:

(a) displaying the document in a first window; and

(b) displaying an update status for each tracked document associated with each record in the data structure, including displaying the update status for each tracked document in a second window.

45. The method of claim 43, wherein the data structure includes a plurality of records, each associated with a tracked document, the method further comprising displaying a list of identifiers for the tracked documents, including indicating in association with each identifier the update status of the associated tracked document.

46. A computer-implemented method of monitoring an update status of a document, the method comprising:

(a) generating a trigger function defining a keyword search criteria for the document;

(b) retrieving data associated with a current copy of the document;

(c) analyzing the retrieved data using the keyword search criteria to determine if the current copy of the document matches the keyword search criteria; and

(d) based upon whether the current copy of the document matches the keyword search criteria, notifying a user that the document has been updated.

47. The method of claim 46, further comprising analyzing saved data from a previous copy of the document using the keyword search criteria to determine if the previous copy of the document matches the keyword search criteria, and wherein notifying the user that the document has been updated includes notifying the user when only one of the retrieved and saved data matches the keyword search criteria.

48. The method of claim 46, wherein the keyword search criteria includes a list of keywords.

49. The method of claim 48, wherein the list of keywords includes at least one of text and a delimiter selected from the group consisting of a format delimiter, a tag, a style delimiter, a type delimiter, a token, an object definition, and combinations thereof.

50. The method of claim 46, wherein the keyword search criteria includes a search expression.

51. The method of claim 50, wherein the search expression is selected from the group consisting of a boolean search expression, a natural language search expression, a wild card expression, and combinations thereof.

52. A computer-implemented method of monitoring an update status of a document, the method comprising:

(a) generating a trigger function defining a notification criteria for the document, the notification criteria identifying at least one author;

(b) retrieving data associated with a current copy of the document;

(c) analyzing the retrieved data using the trigger function to determine if the current copy of the document has been updated by the author; and

(d) selectively notifying a user that the document has been updated based upon whether the current copy of the document has been updated by the author.

53. The method of claim 52, wherein selectively notifying the user includes notifying the user when the document has been updated by the author.

54. The method of claim 52, wherein selectively notifying the user includes notifying the user when the document has been updated by someone other than the author.

55. The method of claim 52, further comprising:

(a) generating a checksum for the current copy of the document;

(b) retrieving a checksum for a previous copy of the document; and

(c) comparing the checksums for the current and previous copies of the document to determine whether the document has been updated.

56. The method of claim 55, wherein selectively notifying the user includes notifying the user only when the checksums for the current and previous copies of the document are different.

57. The method of claim 52, wherein analyzing the retrieved data includes searching the retrieved data for a username for the author.

58. The method of claim 57, wherein searching the retrieved data for the username includes searching for a tag in the document.

59. A computer-implemented method of monitoring an update status of a document, the method comprising:

(a) retrieving data associated with a current copy of the document;

(b) comparing the retrieved data with data associated with a previous copy of the document to determine a relative change between the current and previous copies of the document; and

(c) if the relative change exceeds a threshold value, notifying a user that the document has been updated.

60. The method of claim 59, further comprising saving a copy of the contents of the previous copy of the document, wherein comparing the retrieved data includes retrieving the saved copy of the contents of the previous copy of the document.

61. The method of claim 59, further comprising saving a list of non-common words from the previous copy of the document, wherein retrieving data includes generating a list of non-common words for the current copy of the document, and wherein comparing the retrieved data includes comparing the lists of non-common words for the current and previous copies of the document.

62. The method of claim 61, wherein the non-common words exclude tags and formatting information.

63. The method of claim 61, wherein saving the list of non-common words from the previous copy of the document includes saving a count for each non-common word, the count associated with a number of occurrences of the associated non-common word in the previous copy of the document, wherein retrieving data further includes determining a count for each non-common word in the current copy of the document, and wherein comparing the retrieved data further includes comparing the counts of the non-common words for the current and previous copies of the document.

64. The method of claim 63, wherein comparing the retrieved data further includes summing in a first variable the maximum number of occurrences of each non-common word in either of the current and previous copies of the document, and summing in a second variable the number of duplicate occurrences of each non-common word in the current and previous copies of the document, wherein the relative change is related to the ratio of the first and second variables.

65. A method of displaying a first hypertext document on a computer display, the first hypertext document including at least one hypertext link definition that points to a second hypertext document, the method comprising:

(a) displaying the first hypertext document on the computer display, including displaying the hypertext link definition;

(b) maintaining a visited count for each of a plurality of document locations visited by a user, each visited count associated with a relative frequency in which an associated document location has been visited; and

(d) indicating on the computer display and within the first hypertext document whether the second hypertext document has been updated since a predetermined time only if the visited count for a document location associated with the second hypertext document exceeds a predetermined threshold.

66. A computer system, comprising:

(a) a computer display; and

(b) a processor, coupled to the computer display and configured to display on the computer display a first hypertext document including at least one hypertext link definition that points to a second hypertext document, the processor further configured to maintain a visited count for each of a plurality of document locations visited by a user, each visited count associated with a relative frequency in which an associated document location has been visited, and to indicate on the computer display and within the first hypertext document whether the second hypertext document has been updated since a predetermined time only if the visited count for a document location associated with the second hypertext document exceeds a predetermined threshold.