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EP0889419A2
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Keyword extracting system and text retrieval system using the same
Assignee: Panasonic Holdings Corp
•
Filing: 1998-07-01
•
Granted: —
•
Expires: 2018-07-01
Abstract
Abstract A system for providing keywords to facilitate a search in a text retrieval system. For each of texts constituting a text base, the system creates a word ID of each of words used in the text and a word occurrence count of a corresponding word. The word occurrence count indicates a number of occurrences of a word in each text. For each of words used in any of the texts constituting the text base, the system creates a total word occurrence count and a containing text count indicative of the number of texts containing the word. For each of words contained in the selected texts, a degree of importance is calculated by using the word occurrence count, the total word occurrence count and the containing text count. The words contained in the selected texts are sorted in order of the degree of importance. At least a part of the sorted words are displayed as related keywords.
Inventors
- 👤 Mitsuhiro Sato
- 👤 Naohiko Noguchi
- 👤 Yuji Kanno
- 👤 Masako Nomoto
- 👤 Mitsuaki Inaba
- 👤 Yoshio Fukushige
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:53
CPC Classifications
G; G06; G06F; G06F16/00; G06F16/30; G06F16/31; G06F16/313; Y; Y10; Y10S; Y10S707/00; Y10S707/912; Y10S707/917; Y10S707/99931; Y10S707/99932; Y10S707/99933; Y10S707/99935
Claims Analysis
Total Claims: 78
Claim 1
Independent Claim
178 words
A method of assisting a user to search a text base in a text retrieval system
having a function of receiving a query request and returning a list of text IDs of retrieved
texts; the method comprising the steps of: for each of texts constituting said text base, managing local statistical
information on words, compound words and phrases (hereinafter, referred to en bloc as
"words") used in each said text; managing global statistical information on words used in any of said texts
constituting said text base; said user selecting at least one text from said text base to provide a selected text
list of text IDs of selected texts; for each of words contained in said selected texts, calculating a degree of
importance by using said local statistical information for said retrieval texts and said
global statistical information; sorting said words contained in said selected texts in order of said degrees of
importance; displaying a predetermined number of said sorted words as related keywords;
and assisting said user to enter a query request by using said related keywords.
Claim 2
Dependent Claim
245 words
A method as defined in claim 1, wherein said step of managing local
statistical information includes the step of including, in said local statistical information, a
word ID of each of words used in each said text and a word occurrence count associated
with said word ID, said word occurrence count indicating a number of occurrences in
each said text, of each said word used in each said text, wherein said step of managing global statistic information includes the step of
including, in said global statistical information, a word ID of each of said words used in
any of said texts constituting said text base, a total word occurrence count and a
containing text count which are associated with said word ID of each said word used in
any said text, said total word occurrence count indicating a total number of occurrences in
all of said texts constituting said text base and said containing text count indicating a
number of texts containing each said word used in any said text, and wherein the method further comprises the step of defining said degree of
importance such that said degree of importance is proportional to a sum of said word
occurrence counts taken for said retrieved texts, a number of said retrieved texts, and a
quantity defined for each said word contained in said retrieved texts such that if each said
word appears in more of said texts constituting said test base, said quantity becomes the
smaller.
Claim 3
Dependent Claim
113 words
A method as defined in claim 2, wherein said step of defining said degree of
importance comprises the step of expressing said degree of importance I(Wj) as: I(Wj) = C * r=1 R {WOr(Wj)*IDF(Wj)}*RCT(Wj) , where Wj is a word ID of each said word contained in said retrieved texts, C is a constant,
WOr(Wj) is said word occurrence count of each said word Wj in each said retrieved text
RTr, RCT(Wj) is a number of said retrieved texts which contain each said word Wj, and
IDF(Wj) is said quantity, where RTr is a text ID of each said retrieved text and r = 1,
2,...,R (R = a number of retrieved texts).
Claim 4
Dependent Claim
56 words
A method as defined in claim 1, wherein said step of said user selecting at
least one text comprises the steps of: said user issuing a qery request by using his or her thought-out retrieval
conditions to obtaining a list of retrieved texts; and said user selecting said at least one text from said retrieved texts..
Claim 5
Dependent Claim
118 words
A method as defined in claim 1, further comprising the steps of: said user issuing a further query request to obtain such a smaller list as is a
subset of said list; calculating a distribution index for each said word contained in said selected
texts by using statistical information on words used in said selected texts and statistical
information on words contained in texts listed in said smaller list, said distribution index
being so defined that if each said word contained in said selected texts is distributed in
more of texts listed in said smaller list and distributed in less of said selected texts, said
index becomes larger; and weighting said degree of importance with said distribution index.
Claim 6
Dependent Claim
63 words
A method as defined in claim 5, wherein said distribution index is expressed
as {(MA/CTA(Wj))*(CTB(Wj)/MB)}, where MA and MB are numbers of texts listed
in said list and said smaller list, respectively, and CTA(Wj) and CTB(Wj) are numbers of
texts which are listed in said list and said smaller list, respectively, and which contain
each said word Wj contained in said selected texts.
Claim 7
Dependent Claim
73 words
A method as defined in claim 2, wherein said selected text list is sorted in
order of degrees of congruity of said selected texts, wherein the method further comprises
the step of receiving said sorted list and assigning each of said selected texts of said
sorted list a predetermined weight, and wherein said step of calculating said degree of
importance includes the step of weighting said word occurrence count with said
predetermined weight.
Claim 8
Dependent Claim
53 words
A method as defined in claim 2, further comprising the steps of: assigning a weight to each of said selected texts, wherein said step of
calculating said degree of importance includes the step of weighting said word occurrence
count for each said selected text with said weight assigned to each said selected text.
Claim 9
Dependent Claim
57 words
A method as defined in claim 1, further comprising the steps of: for each said word contained in said selected texts, making a test to see if a
number of texts containing the word is within a predetermined range; and if said word did not pass said test, excluding said word from candidates of said
related keywords.
Claim 10
Dependent Claim
27 words
A method as defined in claim 9, further comprising the step of using, as said
predetermined range, a value associated with a quantity characteristic of said word.
Claim 11
Dependent Claim
16 words
A method as defined in claim 10, wherein said quantity is a length of said
word.
Claim 12
Dependent Claim
75 words
A method as defined in claim 9, further comprising the step of associating
each of second predetermined ranges of a quantity characteristic of said word with a
different predetermined range of said number of texts containing the word, wherein said
step of making a test includes the step of using, as said predetermined range, one of said
different predetermined ranges associated with a second predetermined range on which
said quantity characteristic of said word falls.
Claim 13
Dependent Claim
116 words
A method as defined in claim 2, further comprising the steps of: for each of texts constituting said text base, managing each occurrence of each
said word in each said text constituting said text base and a part, of each said text, of said
each occurrence; assigning each of possible parts of each said text a predetermined weight factor;
and for each said text, accumulating said predetermined weight factor associated
with said part of said each occurrence of each said word to yield a weight by text to each
said word, wherein said step of defining said degree of importance includes the step of
weighting each of said word occurrence counts with said weight by text.
Claim 14
Dependent Claim
151 words
A method as defined in claim 1, further comprising the steps of: for each of texts constituting said text base, managing each occurrence of each
said word in each said text constituting said text base and a location, in each said text, of
said each occurrence; calculating, for said each occurrence of each said word in each said text, a
distance between said location and a location of each of keywords used in said query
request; assigning each of predetermined distance ranges a predetermined weight factor;
and for each of texts constituting said text base, accumulating said predetermined
weight factor associated with said distance for each said keyword for said each
occurrence of each said word to yield a weight by texts to each said word, wherein said
step of defining said degree of importance includes the step of weighting each of said
word occurrence counts with said weight by text.
Claim 15
Dependent Claim
32 words
A method as defined in claim 1, further comprising the step of weighting
said degree of importance with a weight associated with an attribute of each said word in
said selected texts.
Claim 16
Dependent Claim
59 words
A method as defined in claim 1, further comprising the step of: if any inclusion relation is found either in any two of said sorted words or
between any of said sorted words and any of keywords used in said query request,
selecting one of two words involved in said inclusion relation on a basis of a
predetermined criterion.
Claim 17
Dependent Claim
30 words
A method as defined in claim 16, further comprising the step of setting said
predetermined criterion for a comparison of lengths between said two words involved in
said inclusion relation.
Claim 18
Dependent Claim
32 words
A method as defined in claim 16, further comprising the step of setting said
predetermined criterion for a comparison of degrees of importance between said two
words involved in said inclusion relation.
Claim 19
Dependent Claim
31 words
A method as defined in claim 16, wherein said step of selecting one of two
words includes the step of selecting a shorter words and/or a difference between said two
words.
Claim 20
Dependent Claim
86 words
A method as defined in claim 3, further comprising the steps of: on a basis of keywords used in said query request and said list from said
function, sorting said list in order of degrees of congruity of said selected texts; and assigning each of said selected texts of said sorted list a predetermined weight,
wherein said step of expressing said degree of importance the step of weighting
said word occurrence count WOr(Wj) with one of said predetermined weights associated
with each said retrieved text RTr.
Claim 21
Dependent Claim
29 words
A method as defined in claim 1, further comprising the step of classifying
said sorted words by attributes of said sorted words into groups of similar keywords for
display.
Claim 22
Dependent Claim
30 words
A method as defined in claim 1, further comprising the step of classifying
said sorted words by statistical data of said sorted words into groups of similar keywords
for display.
Claim 23
Dependent Claim
26 words
A method as defined in claim 1, further comprising the step of classifying
said sorted words by a thesaurus into groups of similar keywords for display.
Claim 24
Dependent Claim
20 words
A method as defined in claim 21, further comprising the step of displaying
representative keywords in place of said groups.
Claim 25
Dependent Claim
20 words
A method as defined in claim 22, further comprising the step of displaying
representative keywords in place of said groups.
Claim 26
Dependent Claim
20 words
A method as defined in claim 23, further comprising the step of displaying
representative keywords in place of said groups.
Claim 27
Dependent Claim
44 words
A method as defined in claim 1, wherein said assisting said user includes
the step of, in response to a predetermined input from said user, automatically generating
said query request by using at least a part of said predetermined number of said related
words.
Claim 28
Dependent Claim
39 words
A method as defined in claim 1, further comprising the steps of storing said
predetermined number of said related words; and in response to a predetermined input from said user, displaying said stored
predetermined number of said related words.
Claim 29
Independent Claim
204 words
A system for assisting a user to search a text base in a text retrieval system
having a function of receiving a query request and returning a list of text IDs of retrieved
texts; the system comprising: means, operative for each of texts constituting said text base, for managing
local statistical information on words, compound words and phrases (hereinafter, referred
to en bloc as "words") used in each said text; means for managing global statistical information on words used in any of said
texts constituting said text base; means for permitting said user to select at least one text from said text base to
provide a selected text list of text IDs of selected texts; means, operative for each of words contained in said selected texts listed in said
selected text list, for calculating a degree of importance by using said local statistical
information for said retrieval texts and said global statistical information; means for sorting said words contained in said selected texts in order of said
degrees of importance; means for displaying a predetermined number of said sorted words with highest
degrees of importance as related keywords; and means for assisting said user to enter a query request by using said related
keywords.
Claim 30
Dependent Claim
242 words
A system as defined in claim 29, wherein said means for managing local
statistical information includes means for including, in said local statistical information, a
word ID of each of words used in each said text and a word occurrence count associated
with said word ID, said word occurrence count indicating a number of occurrences, in
each said text, of each said word used in each said text, wherein said means for managing global statistic information includes means
for including, in said global statistic information, a word ID of each of said words used in
any of said texts constituting said text base, a total word occurrence count and a
containing text count which are associated with said word ID of each said word used in
any said text, said total word occurrence count indicating a total number of occurrences in
all of said texts constituting said text base and said containing text count indicating a
number of texts containing each said word used in any said text, and wherein the system further comprises means for defining said degree of
importance such that said degree of importance is proportional to a sum of said word
occurrence counts taken for said selected texts, a number of said selected texts, and a
quantity defined for each said word contained in said selected texts such that if each said
word appears in more of said texts constituting said text base, said quantity becomes the
smaller.
Claim 31
Dependent Claim
112 words
A system as defined in claim 30, wherein said means for defining said
degree of importance comprises means for expressing said degree of importance I(Wj) as: I(Wj) = C * r=1 R {WOr(Wj)*IDF(Wj)}*RCT(Wj) , where Wj is a word ID of each said word contained in said selected texts, C is a constant,
WOr(Wj) is said word occurrence count of each said word Wj in each said retrieved text
RTr, RCT(Wj) is a number of said selected texts which contain each said word Wj, and
IDF(Wj) is said quantity, where RTr is a text ID of each said retrieved text and r = 1,
2,...,R (R = a number of selected texts).
Claim 32
Dependent Claim
63 words
A system as defined in claim 29, wherein said means for permitting said
user to select at least one text comprises: means for permitting said user to issue a qery request by using his or her
thought-out retrieval conditions to obtaining a list of retrieved texts; and means for permitting said user to select said at least one text from said retrieved
texts..
Claim 33
Dependent Claim
128 words
A system as defined in claim 29, further comprising: means, responsive to a determination that a further query request from said user
has caused said function to return such a smaller list as is a subset of said list, for
calculating a distribution index for each said word contained in said selected texts by
using statistical information on words used in said selected texts and statistical
information on words contained in texts listed in said smaller list, said distribution index
being so defined that if each said word contained in said selected texts is distributed in
more of texts listed in said smaller list and distributed in less of said selected texts, said
index becomes larger; and means for weighting said degree of importance with said distribution index.
Claim 34
Dependent Claim
63 words
A system as defined in claim 33, wherein said distribution index is
expressed as {(MA/CTA(Wj))*(CTB(Wj)/MB)}, where MA and MB are numbers of
texts listed in said list and said smaller list, respectively, and CTA(Wj) and CTB(Wj) are
numbers of texts which are listed in said list and said smaller list, respectively, and which
contain each said word Wj contained in said selected texts.
Claim 35
Dependent Claim
69 words
A system as defined in claim 30, wherein said list is sorted in order of
degrees of congruity of said selected texts, wherein the system further comprises means
for receiving said sorted list and assigning each of said selected texts of said sorted list a
predetermined weight, and wherein said means for calculating said degree of importance
includes means for weighting said word occurrence count with said predetermined
weight.
Claim 36
Dependent Claim
55 words
A system as defined in claim 30, further comprising means for permitting
said user to assigning a weight to each of said selected texts, wherein said means for
calculating said degree of importance includes means for weighting said word occurrence
count for each said selected text with said weight assigned to each said selected text.
Claim 37
Dependent Claim
63 words
A system as defined in claim 29, further comprising: means, operative for each said word contained in said selected texts, for making
a test to see if a number of texts containing the word is within a predetermined range; and means, responsive to a determination that said word did not pass said test, for
excluding said word from candidates of said related keywords.
Claim 38
Dependent Claim
26 words
A system as defined in claim 37, further comprising means for using, as
said predetermined range, a value associated with a quantity characteristic of said word.
Claim 39
Dependent Claim
16 words
A system as defined in claim 38, wherein said quantity is a length of said
word.
Claim 40
Dependent Claim
73 words
A system as defined in claim 37, further comprising means for associating
each of second predetermined ranges of a quantity characteristic of said word with a
different predetermined range of said number of texts containing the word, wherein said
means for making a test includes means for using, as said predetermined range, one of
said different predetermined ranges associated with a second predetermined range on
which said quantity characteristic of said word falls.
Claim 41
Dependent Claim
120 words
A system as defined in claim 30, further comprising: means, operative for each of texts constituting said text base, for managing each
occurrence of each said word in each said text constituting said text base and a part, of
each said text, of said each occurrence; means for assigning each of possible parts of each said text a predetermined
weight factor; and means operative for each said text for accumulating said predetermined weight
factor associated with said part of said each occurrence of each said word to yield a
weight by text to each said word, wherein said means for defining said degree of
importance includes means for weighting cash of said word occurrence counts with said
weight by text.
Claim 42
Dependent Claim
157 words
A system as defined in claim 29, further comprising: means, operative for each of texts constituting said text base, for managing each
occurrence of each said word in each said text constituting said text base and a location,
in each said text, of said each occurrence; means for calculating, for said each occurrence of each said word in each said
text, a distance between said location and a location of each of keywords used in said
query request; means for assigning each of predetermined distance ranges a predetermined
weight factor; and means, operative for each of texts constituting said text base, for accumulating
said predetermined weight factor associated with said distance for each said keyword for
said each occurrence of each said word to yield a weight by texts to each said word,
wherein said means for defining said degree of importance includes means for weighting
each of said word occurrence counts with said weight by text.
Claim 43
Dependent Claim
31 words
A system as defined in claim 29, further comprising means for weighting
said degree of importance with a weight associated with an attribute of each said word in
said selected texts.
Claim 44
Dependent Claim
62 words
A system as defined in claim 29, further comprising means, responsive to a
determination that any inclusion relation is found either in any two of said sorted words
or between any of said sorted words and any of keywords used in said query request, for
selecting one of two words involved in said inclusion relation on a basis of a
predetermined criterion.
Claim 45
Dependent Claim
29 words
A system as defined in claim 44, further comprising means for setting said
predetermined criterion for a comparison of lengths between said two words involved in
said inclusion relation.
Claim 46
Dependent Claim
31 words
A system as defined in claim 44, further comprising means for setting said
predetermined criterion for a comparison of degrees of importance between said two
words involved in said inclusion relation.
Claim 47
Dependent Claim
30 words
A system as defined in claim 44, wherein said means for selecting one of
two words includes means for selecting a shorter words and/or a difference between said
two words.
Claim 48
Dependent Claim
88 words
A system as defined in claim 31, further comprising: means, operative on a basis of keywords used in said query request and said list
from said function, for sorting said list in order of degrees of congruity of said selected
texts; and means for assigning each of said selected texts of said sorted list a
predetermined weight, wherein said means for expressing said degree of importance
includes means for weighting said word occurrence count WOr(Wj) with one of said
predetermined weights associated with each said retrieved text RTr.
Claim 49
Dependent Claim
28 words
A system as defined in claim 29, further comprising means for classifying
said sorted words by attributes of said sorted words into groups of similar keywords for
display.
Claim 50
Dependent Claim
29 words
A system as defined in claim 29, further comprising means for classifying
said sorted words by statistical data of said sorted words into groups of similar keywords
for display.
Claim 51
Dependent Claim
25 words
A system as defined in claim 29, further comprising means for classifying
said sorted words by a thesaurus into groups of similar keywords for display.
Claim 52
Dependent Claim
19 words
A system as defined in claim 49, further comprising means for displaying
representative keywords in place of said groups.
Claim 53
Dependent Claim
19 words
A system as defined in claim 50, further comprising means for displaying
representative keywords in place of said groups.
Claim 54
Dependent Claim
19 words
A system as defined in claim 51, further comprising means for displaying
representative keywords in place of said groups.
Claim 55
Dependent Claim
44 words
A system as defined in claim 29, wherein said means for assisting said user
includes means, responsive to a predetermined input from said user, for automatically
generating said query request by using at least a part of said predetermined number of
said related words.
Claim 56
Dependent Claim
39 words
A system as defined in claim 29, further comprising means for storing said
predetermined number of said related words; and means responsive to a predetermined input from said user for displaying said
stored predetermined number of said related words.
Claim 57
Dependent Claim
217 words
A test retrieval system capable of assisting a user to search a text base by
providing keywords on the basis of at least one preceding search, the text retrieval system
comprising: a multiplicity of texts constituting said text base; means for managing attribute information on said texts constituting said text
base; means, operative for each of texts constituting said text base, for managing
local statistical information on words, compound words and phrases (hereinafter, referred
to en bloc as "words") used in each said text; means for managing global statistical information on words used in any of said
texts constituting mid text base; means for permitting said user to issue a query request; means responsive to said query request for providing a list of text IDs of
selected texts; means, operative for each of words contained in said selected texts listed in said
selected test list, for calculating a degree of importance by using said local statistical
information for said retrieval texts and said global statistical information; means for sorting said words contained in said selected texts in order of said
degrees of importance; means for displaying a predetermined number of said sorted words with highest
degrees of importance as related keywords; and means for assisting said user to enter a query request by using said related
keywords.
Claim 58
Dependent Claim
245 words
A system as defined in claim 57, wherein said means for managing local
statistical information includes a plurality of local statistical tables each associated with
one of said texts constituting said text base, a local table associated with each said text
containing a word ID of each of words used in each said text and a word occurrence count
associated with said word ID, said word occurrence count indicating a number of
occurrences, in each said text, of each said word used in each said text, wherein said means for managing global statistic information includes a global
statistical table for storing a word ID of each of said words used in any of said texts
constituting said text base, a total word occurrence count and a containing text count
which are associated with said word ID of each said word used in any said text, said total
word occurrence count indicating a total number of occurrences in all of said texts
constituting said text base and said containing text count indicating a number of texts
containing each said word used in any said text, and wherein said degree of importance is proportional to a sum of said word
occurrence counts taken for said selected texts, a number of said selected texts, and a
quantity defined for each said word contained in said selected texts such that if each said
word appears in more of said texts constituting said text base, said quantity becomes the
smaller.
Claim 59
Dependent Claim
102 words
A system as defined in claim 58, wherein said degree of importance, I(Wj),
is defined as: I(Wj) = C * r=1 R {WOr(Wj)*IDF(Wj)}*RCT(Wj) , where Wj is a word ID of each said word contained in said selected texts, C is a constant,
WOr(Wj) is said word occurrence count of each said word Wj in each said retrieved text
RTr, RCT(Wj) is a number of said selected texts which contain each said word Wj, and
IDF(Wj) is said quantity, where RTr is a text ID of each said retrieved text and r = 1,
2,...,R (R = a number of selected texts).
Claim 60
Dependent Claim
63 words
A system as defined in claim 59, wherein said means for permitting said
user to select at least one text comprises: means for permitting said user to issue a qery request by using his or her
thought-out retrieval conditions to obtaining a list of retrieved texts; and means for permitting said user to select said at least one text from said retrieved
texts.
Claim 61
Dependent Claim
154 words
A system as defined in claim 57, further comprising: means, responsive to a determination that a first query request and a second
query request issued after said first one have resulted in a first list of first text IDs of first
selected texts and a second list of second text IDs of second selected texts such that said
second list is a subset of said first list, for calculating a distribution index for each said
word contained in said first selected texts by using statistical information on words used
in said first selected texts and statistical information on words used in said second
selected texts, said distribution index being so defined that if each word is distributed in
more of texts listed in said second list and distributed in less of said first selected texts,
said index of the word becomes larger; and means for weighting said degree of importance with said distribution index.
Claim 62
Dependent Claim
63 words
A system as defined in claim 61, wherein said distribution index is
expressed as {(MA/CTA(Wj))*(CTB(Wj)/MB)}, where MA and MB are numbers of
texts listed in said list and said smaller list, respectively, and CTA(Wj) and CTB(Wj) are
numbers of texts which are listed in said list and said smaller list, respectively, and which
contain each said word Wj contained in said selected texts.
Claim 63
Dependent Claim
69 words
A system as defined in claim 58, wherein said list is sorted in order of
degrees of congruity of said selected texts, wherein the system further comprises means
for receiving said sorted list and assigning each of said selected texts of said sorted list a
predetermined weight, and wherein said means for calculating said degree of importance
includes means for weighting said word occurrence count with said predetermined
weight.
Claim 64
Dependent Claim
63 words
A system as defined in claim 57, further comprising: means, operative for each said word contained in said selected texts, for making
a test to see if a number of texts containing the word is within a predetermined range; and means, responsive to a determination that said word did not pass said test, for
excluding said word from candidates of said related keywords.
Claim 65
Dependent Claim
120 words
A system as defined in claim 58, further comprising: means, operative for each of texts constituting said text base, for managing each
occurrence of each said word in each said text constituting said text base and a part, of
each said text, of said each occurrence; means for assigning each of possible parts of each said text a predetermined
weight factor; and means operative for each said text for accumulating said predetermined weight
factor associated with said part of said each occurrence of each said word to yield a
weight by text to each said word, wherein said means for defining said degree of
importance includes means for weighting each of said word occurrence counts with said
weight by text.
Claim 66
Dependent Claim
157 words
A system as defined in claim 57, further comprising: means, operative for each of texts constituting said text base, for managing each
occurrence of each said word in each said text constituting said text base and a location,
in each said text, of said each occurrence; means for calculating, for said each occurrence of each said word in each said
text, a distance between said location and a location of each of keywords used in said
query request; means for assigning each of predetermined distance ranges a predetermined
weight factor; and means, operative for each of texts constituting said text base, for accumulating
said predetermined weight factor associated with said distance for each said keyword for
said each occurrence of each said word to yield a weight by texts to each said word,
wherein said means for defining said degree of importance includes means for weighting
each of said word occurrence counts with said weight by text.
Claim 67
Dependent Claim
31 words
A system as defined in claim 57, further comprising means for weighting
said degree of importance with a weight associated with an attribute of each said word in
said selected texts.
Claim 68
Dependent Claim
62 words
A system as defined in claim 57, further comprising means, responsive to a
determination that any inclusion relation is found either in any two of said sorted words
or between any of said sorted words and any of keywords used in said query request, for
selecting one of two words involved in said inclusion relation on a basis of a
predetermined criterion.
Claim 69
Dependent Claim
29 words
A system as defined in claim 67, further comprising means for setting said
predetermined criterion for a comparison of lengths between said two words involved in
said inclusion relation.
Claim 70
Dependent Claim
31 words
A system as defined in claim 67, further comprising means for setting said
predetermined criterion for a comparison of degrees of importance between said two
words involved in said inclusion relation.
Claim 71
Dependent Claim
30 words
A system as defined in claim 67, wherein said means for selecting one of
two words includes means for selecting a shorter words and/or a difference between said
two words.
Claim 72
Dependent Claim
88 words
A system as defined in claim 59, further comprising: means, operative on a basis of keywords used in said query request and said list
from said function, for sorting said list in order of degrees of congruity of said selected
texts; and means for assigning each of said selected texts of said sorted list a
predetermined weight, wherein said means for expressing said degree of importance
includes means for weighting said word occurrence count WOr(Wj) with one of said
predetermined weights associated with each said retrieved text RTr.
Claim 73
Dependent Claim
28 words
A system as defined in claim 57, further comprising means for classifying
said sorted words by attributes of said sorted words into groups of similar keywords for
display.
Claim 74
Dependent Claim
19 words
A system as defined in claim 73, further comprising means for displaying
representative keywords in place of said groups.
Claim 75
Dependent Claim
44 words
A system as defined in claim 57, wherein said means for assisting said user
includes means, responsive to a predetermined input from said user, for automatically
generating said query request by using at least a part of said predetermined number of
said related words.
Claim 76
Dependent Claim
39 words
A system as defined in claim 57, further comprising means for storing said
predetermined number of said related words; and means responsive to a predetermined input from said user for displaying said
stored predetermined number of said related words.
Claim 77
Dependent Claim
39 words
A system as defined in claim 57, further comprising a storage media drive
adapted for a detachable mass storage medium, wherein said multiplicity of texts
constituting said text base are stored in one of said detachable mass storage media.
Claim 78
Dependent Claim
24 words
A system defined in claim 57, further comprising a two way
communication means, wherein the system is distributed on a server and client system.
References Cited (Backward Citations)
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