Retrieval device, retrieval server, and retrieval system, as well as retrieval method and computer program with greater extent of retrieval conditions

• US 7,305,428 B2
• Filed: 04/17/2002
• Issued: 12/04/2007
• Est. Priority Date: 04/18/2001
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Sakata, Kazuhiro
• Primary Examiner(s): Dharia; Rupal
• Assistant Examiner(s): Taylor; Nicholas R
• Application Number:
  US10/123,421
• Publication Number:
  US 20020156845A1
• Time in Patent Office: 2,057 Days
• Field of Search: 709/203
• US Class Current: 709/203
• CPC Class Codes: G06F 16/951 Indexing; Web crawling techniques
• CPC Class Codes: G06F 16/9537 Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
• CPC Class Codes: G06F 16/9538 Presentation of query results
• CPC Class Codes: G06F 21/6245 Protecting personal data, e.g. for financial or medical purposes
• CPC Class Codes: G06F 2221/2111 Location-sensitive, e.g. geographical location, GPS

Abstract

A retrieval system includes a retrieval server for providing retrieval service and a retrieval device accessible through a transmission medium by the retrieval server. The retrieval device is configured to modify a first retrieval condition with a first retrieving extent into a second retrieval condition with a second retrieving extent which includes the first retrieving extent and which is greater than the first retrieving extent. The server retrieves first retrieved information under a second retrieval condition. The retrieval device retrieves second retrieved information from the first retrieved information under a first retrieval condition designated by a user. The first retrieval condition includes a first factor in connection with the user'"'"'s privacy-related information. The first retrieval condition includes a second factor corresponding to the first factor. The second factor has a greater retrieving extent than the first factor for protection of the user'"'"'s privacy-related information.

Claims

1. A retrieval device accessible to at least one retrieval server providing retrieval service, said retrieval device comprising:

a retrieval condition modifying unit for modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

a retrieval information receiving unit for transmitting said second retrieval condition to said retrieval server and for receiving first retrieved information matched to said second retrieval condition from said retrieval server; and

a retrieving unit for retrieving second retrieved information from said first retrieved information, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information,

wherein said first retrieval condition includes a first factor in connection with a user'"'"'s privacy-related information, and said second retrieval condition includes a second factor corresponding to said first factor, said second factor having a greater scale than said first factor,

wherein said retrieval information receiving unit is configured to receive, from said retrieval server, pointer information in connection with said first retrieved information; and

wherein said retrieving unit is configured to retrieve condition-matched pointer information, which is matched to said first retrieval condition, from said received pointer information.

2. The retrieval device as claimed in claim 1, wherein said retrieval condition modifying unit is adjustable for modifying said first retrieval condition into said second retrieval condition in accordance with a predetermined degree of indistinctness for each kind of factor of said second retrieval condition, and in accordance with a predetermined procedure for modifying said first retrieval condition into said second retrieval condition, and said retrieval condition modifying unit is also adjustable for maintaining said predetermined degree of indistinctness and said predetermined procedure.

3. The retrieval device as claimed in claim 1, wherein said retrieval condition modifying unit is adjustable for modifying said first retrieval condition into said second retrieval condition in accordance with a user-designated degree of indistinctness for each kind of factor of said second retrieval condition, and in accordance with a user-designated procedure for modifying said first retrieval condition into said second retrieval condition.

4. The retrieval device as claimed in claim 1, further comprising a first memory for storing said first retrieval condition when entered by the user, wherein said retrieval condition modifying unit is adjustable for fetching said first retrieval condition from said first memory and for modifying said first retrieval condition into said second retrieval condition upon receipt of a retrieval request.

5. The retrieval device as claimed in claim 1, wherein said retrieval device is accessible by an external device, which is capable of generating at least a part of said first retrieval condition, for receiving said at least a part of said first retrieval condition from said external device.

6. The retrieval device as claimed in claim 1, wherein said retrieval condition modifying unit is adjustable for selectively deleting each factor of said second retrieval condition upon receipt of a user'"'"'s instruction.

7. The retrieval device as claimed in claim 1, further comprising:

a first retrieved information storing unit for storing said first retrieved information, while allowing said retrieving unit to retrieve said second retrieved information from said first retrieved information storing unit.

8. The retrieval device as claimed in claim 7, further comprising:

a control unit for making a decision to update said first retrieved information stored in said first retrieved information storing unit by verifying whether said first retrieved information stored in said first retrieved information storing unit includes any content in connection with said first retrieval condition.

9. The retrieval device as claimed in claim 8, wherein said control unit is configured to make a decision to update said first retrieved information upon receipt of a retrieval request.

10. The retrieval device as claimed in claim 8, wherein said control unit automatically makes a decision to update said first retrieved information periodically.

13. The retrieval device as claimed in claim 1, wherein said retrieving unit is configured to receive retrieval program data, including a retrieval program, from said retrieval server, and to retrieve said second retrieved information in accordance with said retrieval program.

14. The retrieval device as claimed in claim 1, wherein:

said retrieval device is configured to receive retrieval program data, including a retrieval program, from a retrieval program server separately from said first retrieved information; and

said retrieving unit is configured to retrieve said second retrieved information in accordance with said retrieval program.

15. The retrieval device as claimed in claim 1, further comprising:

an input/output unit connectable through a wireless network to an extended client operable by a user.

16. The retrieval device as claimed in claim 15, further comprising an extended client comprising a mobile terminal.

17. The retrieval device as claimed in claim 1, wherein:

said retrieval information receiving unit is configured to receive, from said retrieval server, a retrieval program in addition to said condition-matched pointer information; and

said retrieving unit is configured to retrieve said condition-matched pointer information in accordance with said retrieval program.

18. The retrieval device as claimed in claim 1, further comprising:

a selector for selecting pointer information from said received pointer information in accordance with a user'"'"'s instruction, and

wherein said retrieval information receiving unit is configured to transmit, to said retrieval server, said selected pointer information and a request for full information in connection with said selected pointer information.

19. The retrieval device as claimed in claim 18, wherein said retrieval information receiving unit is configured to transmit an item of non-requested dummy pointer information, in addition to said selected pointer information, and a request for full information in connection with both said selected pointer information and said non-requested dummy pointer information.

20. The retrieval device as claimed in claim 1, further comprising:

a selector for selecting pointer information from said received pointer information in accordance with a user'"'"'s instruction, wherein;

said retrieval information receiving unit is configured to transmit, to a server other than said retrieval server, said selected pointer information and a request for full information in connection with said selected pointer information, and

said other server is configured to maintain said full information in connection with said selected pointer information.

21. The retrieval device as claimed in claim 20, wherein said retrieval information receiving unit is configured to transmit an item of non-requested dummy pointer information, in addition to said selected pointer information, and a request for full information in connection with both said selected pointer information and said non-requested dummy pointer information.

11. A retrieval device accessible to at least one retrieval server providing retrieval service, said retrieval device comprising:

a retrieval condition modifying unit for modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

a retrieval information receiving unit for transmitting said second retrieval condition to said retrieval server and for receiving first retrieved information matched to said second retrieval condition from said retrieval server;

a retrieving unit for retrieving second retrieved information from said first retrieved information, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information;

a first retrieved information storing unit for storing said first retrieved information, while allowing said retrieving unit to retrieve said second retrieved information from said first retrieved information storing unit; and

a control unit for making a decision to update said first retrieved information stored in said first retrieved information storing unit by verifying whether said first retrieved information stored in said first retrieved information storing unit includes any content in connection with said first retrieval condition,

wherein said first retrieval condition includes a first factor in connection with a user'"'"'s privacy-related information, and said second retrieval condition includes a second factor corresponding to said first factor, said second factor having a greater scale than said first factor,

wherein said control unit is adjustable for predicting a first retrieval condition to be entered in the future, and for generating the predicted retrieval condition in connection with said first retrieval condition,

wherein said retrieval condition modifying unit is configured for modifying said predicted retrieval condition into said second retrieval condition, and

wherein said retrieval information receiving unit is configured for transmitting said second retrieval condition to said retrieval server and for receiving said first retrieved information matched to said second retrieval condition from said retrieval server.

12. A retrieval device accessible to at least one retrieval server providing retrieval service, said retrieval device comprising:

a retrieval condition modifying unit for modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

a retrieval information receiving unit for transmitting said second retrieval condition to said retrieval server and for receiving first retrieved information matched to said second retrieval condition from said retrieval server;

a retrieving unit for retrieving second retrieved information from said first retrieved information, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information;

a first retrieved information storing unit for storing said first retrieved information, while allowing said retrieving unit to retrieve said second retrieved information from said first retrieved information storing unit; and

a control unit for making a decision to update said first retrieved information stored in said first retrieved information storing unit by verifying whether said first retrieved information stored in said first retrieved information storing unit includes any content in connection with said first retrieval condition,

wherein said first retrieval condition includes a first factor in connection with a user'"'"'s privacy-related information, and said second retrieval condition includes a second factor corresponding to said first factor, said second factor having a greater scale than said first factor, and

wherein said retrieval information receiving unit is configured for transmitting contents of said first retrieved information stored in said first retrieved information storing unit, in addition to said first retrieval condition, to said retrieval server, for receiving differential information in connection with said first retrieved information from said retrieval server, and for updating said first retrieved information based on said differential information.

22. A retrieval system comprising:

a retrieval server for providing retrieval service; and

a retrieval device accessible through a transmission medium to said retrieval server, said retrieval device comprising;

a retrieval condition modifying unit for modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

a retrieval information receiving unit for transmitting said second retrieval condition to said retrieval server, to allow said retrieval server to retrieve first retrieved information which is matched to said second retrieval condition, and for receiving said first retrieved information from said retrieval server; and

a retrieving unit for retrieving second retrieved information from said first retrieved information, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information,

wherein said first retrieval condition includes a first factor, in connection with a user'"'"'s privacy-related information, and said second retrieval condition includes a second factor, corresponding to said first factor,

wherein said second factor has a greater scale than said first factors

wherein said retrieval server further comprises a pointer information generating unit for generating pointer information in connection with said first retrieved information,

wherein said retrieval information receiving unit is configured to receive, from said retrieval server, said generated pointer information, and

wherein said retrieving unit is configured to retrieve condition-matched pointer information, which is matched to said first retrieval condition, from said received pointer information.

23. The retrieval system as claimed in claim 22, wherein:

said retrieval condition modifying unit is configured to be adjustable to modify said first retrieval condition into said second retrieval condition in accordance with a predetermined degree of indistinctness for each kind of factor of said second retrieval condition, and a predetermined procedure for modifying said first retrieval condition into said second retrieval condition, and also configured to maintain said predetermined degree of indistinctness and said predetermined procedure.

24. The retrieval system as claimed in claim 22, wherein said retrieval condition modifying unit is configured to be adjustable to modify said first retrieval condition into said second retrieval condition in accordance with a user-designated degree of indistinctness for each kind of factor of said second retrieval condition and a user-designated procedure for modifying said first retrieval condition into said second retrieval condition.

25. The retrieval system as claimed in claim 22, wherein said retrieval device further comprises a first memory for storing said first retrieval condition, and said retrieval condition modifying unit is configured to fetch said first retrieval condition from said first memory and to modify said first retrieval condition into said second retrieval condition upon receipt of a retrieval request.

26. The retrieval system as claimed in claim 22, wherein said retrieval device is accessible to an external device, which is capable of generating at least a part of said first retrieval condition, for receiving said at least a part of said first retrieval condition from the external device.

27. The retrieval system as claimed in claim 22, wherein said retrieval condition modifying unit is configured to be adjustable to selectively delete each factor of said second retrieval condition upon receipt of a user'"'"'s instruction.

28. The retrieval system as claimed in claim 22, wherein said retrieval device further comprises:

a first retrieved information storing unit for storing said first retrieved information and for allowing said retrieving unit to retrieve said second retrieved information from said first retrieved information storing unit.

29. The retrieval system as claimed in claim 28, wherein said retrieval device further comprises:

a control unit for making a decision to update said first retrieved information stored in said first retrieved information storing unit by verifying whether said first retrieved information stored in said first retrieved information storing unit includes any content in connection with said first retrieval condition.

30. The retrieval system as claimed in claim 29, wherein said control unit is configured to make a decision to update said first retrieved information upon receipt of a retrieval request.

31. The retrieval system as claimed in claim 29, wherein said control unit is configured to automatically make a decision to update said first retrieved information periodically.

34. The retrieval system as claimed in claim 22, wherein:

said retrieval server is configured to provide said retrieval device with retrieval program data including a retrieval program; and

said retrieving unit is configured to retrieve said second retrieved information in accordance with said retrieval program.

35. The retrieval system as claimed in claim 22, wherein said retrieval device is configured to receive retrieval program data including a retrieval program from a retrieval program server separately from said first retrieved information;

and

said retrieving unit is configured to retrieve said second retrieved information in accordance with said retrieval program.

36. The retrieval system as claimed in claim 22, wherein said retrieval device further comprises:

an input/output unit connectable through a wireless network to an extended client operable by a user.

37. The retrieval system as claimed in claim 36, wherein said retrieval device further comprises an extended client comprising a mobile terminal.

38. The retrieval system as claimed in claim 22, wherein:

said retrieval information receiving unit is configured to receive, from said retrieval server, a retrieval program in addition to said condition-matched pointer information; and

said retrieving unit is configured to retrieve said condition-matched pointer information in accordance with said retrieval program.

39. The retrieval system as claimed in claim 22, wherein said retrieval device further comprises:

a selector for selecting pointer information from said received pointer information in accordance with a user'"'"'s instruction, and

said retrieval information receiving unit transmits, to said retrieval server, said selected pointer information and a request for full information in connection with said selected pointer information.

40. The retrieval system as claimed in claim 39, wherein said retrieval information receiving unit transmits an item of non-requested dummy pointer information in addition to said selected pointer information and a request for full information in connection with both said selected pointer information and said non-requested dummy pointer information.

41. The retrieval system as claimed in claim 22, wherein said retrieval device further comprises:

a selector for selecting pointer information from said received pointer information in accordance with a user'"'"'s instruction, and

said retrieval information receiving unit transmits, to a server other than said retrieval server, said selected pointer information and a request for full information in connection with said selected pointer information, where the other server maintains said full information in connection with said selected pointer information.

42. The retrieval system as claimed in claim 41, wherein said retrieval information receiving unit transmits an item of non-requested dummy pointer information in addition to said selected pointer information and a request for full information in connection with both said selected pointer information and said non-requested dummy pointer information.

43. The retrieval system as claimed in claim 22, wherein said retrieval server further comprises a retrieval program storing unit for storing said retrieval program.

44. The retrieval system as claimed in claim 22, wherein:

said retrieval server further comprises a pointer information generating unit for generating pointer information in connection with said first retrieved information;

said retrieval information providing unit is configured to provide said retrieval device with said generated pointer information; and

said retrieval device is configured to retrieve condition-matched pointer information from said provided pointer information.

32. A retrieval system comprising:

a retrieval server for providing retrieval service; and

a retrieval device accessible through a transmission medium to said retrieval server, said retrieval device comprising;

a retrieval condition modifying unit for modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

a retrieval information receiving unit for transmitting said second retrieval condition to said retrieval server, to allow said retrieval server to retrieve first retrieved information which is matched to said second retrieval condition, and for receiving said first retrieved information from said retrieval server;

a retrieving unit for retrieving second retrieved information from said first retrieved information, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information;

a first retrieved information storing unit for storing said first retrieved information and for allowing said retrieving unit to retrieve said second retrieved information from said first retrieved information storing unit; and

a control unit for making a decision to update said first retrieved information stored in said first retrieved information storing unit by verifying whether said first retrieved information stored in said first retrieved information storing unit includes any content in connection with said first retrieval condition,

wherein said first retrieval condition includes a first factor, in connection with a user'"'"'s privacy-related information, and said second retrieval condition includes a second factor, corresponding to said first factor,

wherein said second factor has a greater scale than said first factor,

wherein said control unit is configured to be adjustable to predict said first retrieval condition to be entered in the future, and generates a predicted retrieval condition in connection with said first retrieval condition,

wherein said retrieval condition modifying unit is configured to modify said predicted retrieval condition into said second retrieval condition, and

wherein said retrieval information receiving unit is configured to transmit said second retrieval condition to said retrieval server and to receive said first retrieved information matched to said second retrieval condition from said retrieval server.

33. A retrieval system comprising:

a retrieval server for providing retrieval service; and

a retrieval device accessible through a transmission medium to said retrieval server, said retrieval device comprising;

a retrieval condition modifying unit for modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

a retrieval information receiving unit for transmitting said second retrieval condition to said retrieval server, to allow said retrieval server to retrieve first retrieved information which is matched to said second retrieval condition, and for receiving said first retrieved information from said retrieval server;

a retrieving unit for retrieving second retrieved information from said first retrieved information, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information;

a first retrieved information storing unit for storing said first retrieved information and for allowing said retrieving unit to retrieve said second retrieved information from said first retrieved information storing unit; and

a control unit for making a decision to update said first retrieved information stored in said first retrieved information storing unit by verifying whether said first retrieved information stored in said first retrieved information storing unit includes any content in connection with said first retrieval condition,

wherein said first retrieval condition includes a first factor, in connection with a user'"'"'s privacy-related information, and said second retrieval condition includes a second factor, corresponding to said first factor,

wherein said second factor has a greater scale than said first factor,

wherein said control unit is configured to be adjustable to predict said first retrieval condition to be entered in the future, and generates a predicted retrieval condition in connection with said first retrieval condition, and

wherein said retrieval information receiving unit is configured to transmit contents of said first retrieved information, stored in said first retrieved information storing unit, in addition to said first retrieval condition to said retrieval server, and to receive differential information in connection with said first retrieved information from said retrieval server for updating said first retrieved information based on said differential information.

45. A retrieval method for retrieving information from a retrieval server, which provides retrieval service, by a retrieval device accessible through a transmission medium to said retrieval server, said method comprising:

modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

transmitting said second retrieval condition to said retrieval server to allow said retrieval server to retrieve first retrieved information which is matched to said second retrieval condition;

retrieving second retrieved information from said first retrieved information retrieved by said retrieval server, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information;

generating pointer information in connection with said first retrieved information; and

retrieving condition-matched pointer information, which is matched to said first retrieval condition, from said generated pointer information,

wherein said first retrieval condition comprises a first factor in connection with a user'"'"'s privacy-related information,

wherein said first retrieval condition comprises a second factor corresponding to said first factor, and

wherein said second factor has a greater scale than said first factor.

46. The retrieval method as claimed in claim 45, wherein said first retrieval condition is modified into said second retrieval condition in accordance with a predetermined degree of indistinctness for each kind of factor of said second retrieval condition and a predetermined procedure for modifying said first retrieval condition into said second retrieval condition.

47. The retrieval method as claimed in claim 45, wherein said first retrieval condition is modified into said second retrieval condition in accordance with a user-designated degree of indistinctness for each kind of factor of said second retrieval condition, and a user-designated procedure for modifying said first retrieval condition into said second retrieval condition.

48. The retrieval method as claimed in claim 45, wherein said first retrieval condition has been previously entered by a user, and is fetched from a memory and modified into said second retrieval condition upon receipt of a retrieval request.

49. The retrieval method as claimed in claim 45, wherein each factor of said second retrieval condition is selectively deleted upon receipt of a user'"'"'s instruction.

50. The retrieval method as claimed in claim 49, further comprising:

updating said first retrieved information by verifying whether said first retrieved information includes any content in connection with said first retrieval condition.

51. The retrieval method as claimed in claim 50, wherein said first retrieved information is updated upon receipt of a retrieval request.

52. The retrieval method as claimed in claim 50, wherein said first retrieved information is updated automatically and periodically.

55. The retrieval method as claimed in claim 45, wherein said second retrieved information is retrieved in accordance with a retrieval program.

56. The retrieval method as claimed in claim 45, further comprising:

receiving retrieval program data, including a retrieval program, from a retrieval program server separately from said first retrieved information; and

retrieving said second retrieved information in accordance with said retrieval program.

57. The retrieval method as claimed in claim 45, further comprising:

selecting pointer information from said retrieved pointer information in accordance with a user'"'"'s instruction; and

transmitting, to said retrieval server, said selected pointer information and a request for full information in connection with said selected pointer information.

58. The retrieval method as claimed in claim 57, further comprising:

transmitting, to said retrieval server, an item of non-requested dummy pointer information, in addition to said selected pointer information, and a request for full information in connection with both said selected pointer information and said non-requested dummy pointer information.

59. The retrieval method as claimed in claim 45, further comprising:

selecting pointer information from said retrieved pointer information in accordance with a user'"'"'s instruction; and

transmitting, to a server other than said retrieval server, said selected pointer information and a request for full information in connection with said selected pointer information, where said other server maintains said full information in connection with said selected pointer information.

60. The retrieval method as claimed in claim 59, further comprising:

transmitting, to said other server, an item of non-requested dummy pointer information, in addition to said selected pointer information, and a request for full information in connection with both said selected pointer information and said non-requested dummy pointer information.

61. A machine-readable medium having stored thereon a computer program to be executed by a computer for implementing the retrieval method of claim 45.

53. A retrieval method for retrieving information from a retrieval server, which provides retrieval service, by a retrieval device accessible through a transmission medium to said retrieval server, said method comprising:

modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

transmitting said second retrieval condition to said retrieval server to allow said retrieval server to retrieve first retrieved information which is matched to said second retrieval condition;

retrieving second retrieved information from said first retrieved information retrieved by said retrieval server, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information;

updating said first retrieved information by verifying whether said first retrieved information includes any content in connection with said first retrieval condition;

making a prediction of said first retrieval condition to be entered by the user in the future, for generating a predicted retrieval condition in connection with said first retrieval condition; and

modifying said predicted retrieval condition into said second retrieval conditions

wherein said first retrieval condition comprises a first factor in connection with a user'"'"'s privacy-related information,

wherein said first retrieval condition comprises a second factor corresponding to said first factor,

wherein said second factor has a greater scale than said first factor,

wherein each factor of said second retrieval condition is selectively deleted upon receipt of a user'"'"'s instruction.

54. A retrieval method for retrieving information from a retrieval server, which provides retrieval service, by a retrieval device accessible through a transmission medium to said retrieval server, said method comprising:

modifying a first retrieval condition having a first scale into a second retrieval condition having a second scale which includes said first scale and which is greater than said first scale;

transmitting said second retrieval condition to said retrieval server to allow said retrieval server to retrieve first retrieved information which is matched to said second retrieval condition;

retrieving second retrieved information from said first retrieved information retrieved by said retrieval server, said second retrieved information being matched to said first retrieval condition, so that said second retrieved information has a lesser scale than does said first retrieved information;

updating said first retrieved information by verifying whether said first retrieved information includes any content in connection with said first retrieval condition;

transmitting contents of said first retrieved information to said retrieval server in addition to said first retrieval condition;

receiving differential information in connection with said first retrieved information from said retrieval server; and

updating said first retrieved information based on said differential information,

wherein said first retrieval condition comprises a first factor in connection with a user'"'"'s privacy-related information,

wherein said first retrieval condition comprises a second factor corresponding to said first factor,

wherein said second factor has a greater scale than said first factor,

wherein each factor of said second retrieval condition is selectively deleted upon receipt of a user'"'"'s instruction.