MELVYL RLG-Z39.50 DATABASES TELNET STATISTICS
Time period: 07/01/99 through 07/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 311 506 817
Davis 128 4 132
Irvine 122 0 122
Los Angeles 138 244 382
Riverside 75 20 95
San Diego 44 27 71
San Francisco 32 0 32
Santa Barbara 206 55 261
Santa Cruz 25 49 74
Other - UC 3 22 25
Other-Network UC n/a 127 127
_______ ______ _____
1,084 1,054 2,138
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 8 18 100
2-4 a.m. 4 20 302
4-6 a.m. 4 15 97
6-8 a.m. 7 13 49
8-10 a.m. 165 432 3,431
10-12 a.m. 411 1,267 9,291
12-2 p.m. 464 1,765 15,850
2-4 p.m. 608 1,901 19,279
4-6 p.m. 322 950 26,230
6-8 p.m. 79 262 6,519
8-10 p.m. 43 146 1,175
10-12 p.m. 23 99 619
__________ __________ __________ _________________
Total: 2,138 6,888 82,942
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 943 1,453 2,396
Davis 336 4 340
Irvine 481 0 481
Los Angeles 709 649 1,358
Riverside 245 53 298
San Diego 74 72 146
San Francisco 73 0 73
Santa Barbara 1,016 135 1,151
Santa Cruz 96 147 243
Other - UC 3 86 89
Other-Network UC n/a 313 313
_______ ______ _____
3,976 2,912 6,888
Number of FIND commands by database
RLIN Bibliographic File 3,660
Anthropological Literature 1,384
Avery Index to Architectural Per. 829
History of Science & Technology 112
Index to Foreign Legal Periodical 39
World Law Index-Hispanic Legis 0
Handbook of Latin Amer. Studies 0
Chicano 430
English Short Title Catalogue 434
Total number of FIND commands 6,888
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 9,649 30,958 40,607
Davis 9,533 2 9,535
Irvine 2,179 0 2,179
Los Angeles 5,262 6,218 11,480
Riverside 1,179 403 1,582
San Diego 748 946 1,694
San Francisco 1,065 0 1,065
Santa Barbara 8,288 1,183 9,471
Santa Cruz 1,458 1,243 2,701
Other - UC 6 657 663
Other-Network UC n/a 1,965 1,965
_______ ______ _____
39,367 43,575 82,942
Number of Records Displayed by database
RLIN Bibliographic File 28,950
Anthropological Literature 18,243
Avery Index to Architectural Per. 7,096
History of Science & Technology 868
Index to Foreign Legal Periodical 204
World Law Index-Hispanic Legis 0
Handbook of Latin Amer. Studies 0
Chicano 5,056
English Short Title Catalogue 22,525
Total number of Records Displayed 82,942
1.4 Relative Use of Databases
______________________________
Relative use of RLG-Z39.50 databases: Sessions Percentage
RLIN Bibliographic File 1,103 51.6%
Anthropological Literature 444 20.8%
Avery Index to Architectural Per. 258 12.1%
History of Science & Technology 40 1.9%
Index to Foreign Legal Periodical 11 0.5%
World Law Index-Hispanic Legis 0 0.0%
Handbook of Latin Amer. Studies 0 0.0%
Chicano 149 7.0%
English Short Title Catalogue 133 6.2%
Percent of searches done in the RCAT database 53.1%
Percent of searches done in the ANTH database 20.1%
Percent of searches done in the ARCH database 12.0%
Percent of searches done in the HSCI database 1.6%
Percent of searches done in the FLEG database 0.6%
Percent of searches done in the HLEG database 0.0%
Percent of searches done in the HLAS database 0.0%
Percent of searches done in the CDB database 6.2%
Percent of searches done in the ESTC database 6.3%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 2.7
Standard deviation in seconds 10.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 0.8
2.1 RLIN Bibliographic File Database Statistics
________________________________________________
Median session length (minutes:seconds) 11:31
Average session length (minutes:seconds) 14:17
Longest session recorded (minutes:seconds) 117:23
Average number of searches completed per session 3.3
Retrievals per search - median 2.0
Retrievals per search - average 141.8
Retrievals per search - standard deviation 2654.9
Percent of searches completed with 0 results 28.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,400 33.1%
DISPLAY (excluding automatic displays) 4,271 41.6%
HELP 74 0.7%
EXPLAIN 115 1.1%
SET/RESET 672 6.5%
SHOW 93 0.9%
ADD ON (AND, OR, AND NOT) 260 2.5%
LOGON or LOGOFF 1,042 10.2%
COMMENT 1 0.0%
USE 10 0.1%
OTHER 324 3.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.3%
SHORT 50.7%
LONG 24.4%
TAGS 0.2%
FIELDS 3.2%
PERIODICALS 2.4%
COMMENTS 0.0%
Other 12.8%
RLIN Bibliographic File Database Statistics continued:
______________________________________________________
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 816 22.3% 194 23.8% 13 137.0 794.9
EXACT AUTHOR 19 0.5% 10 52.6% 9 15.8 17.7
CORPORATE AUTHOR 48 1.3% 12 25.0% 12 395.3 966.0
EXACT CORPORATE 3 0.1% 1 33.3% 21 21.0 0.0
TITLE WORD 1,256 34.3% 361 28.7% 7 291.0 5031.4
EXACT TITLE/SERI 610 16.6% 180 29.5% 2 226.1 2262.4
EXACT JOURNAL 3 0.1% 2 66.7% 2 2.0 0.0
SUBJECT 111 3.0% 39 35.1% 23 631.6 1908.8
EXACT SUBJECT 4 0.1% 3 75.0% 2,626 2626.0 0.0
SERIES 42 1.1% 19 45.2% 4 48.0 94.6
CONFERENCE 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CONFERENCE 0 0.0% 0 0.0% 0 0.0 0.0
FORM 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 7 0.2% 1 14.3% 51 66.0 74.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
GOV DOC NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
REPORT NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
GE 0 0.0% 0 0.0% 0 0.0 0.0
NOTES 2 0.1% 1 50.0% 2 2.0 0.0
MUSIC PUBLISHER 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PLACE OF PUBL. 0 0.0% 0 0.0% 0 0.0 0.0
UNIFORM TITLE 0 0.0% 0 0.0% 0 0.0 0.0
XOT 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 77 2.1% 32 41.6% 4 61.1 234.7
EXACT PE 16 0.4% 6 37.5% 3 37.0 74.1
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 653 17.8% 193 29.6% 3 14.5 53.3
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 291 8.6% 93 32.0% 5 20.9 50.7
Single 3,084 91.4% 867 28.1% 6 229.3 3395.4
2.2 Anthropological Literature Database Statistics
___________________________________________________
Median session length (minutes:seconds) 5:12
Average session length (minutes:seconds) 10:59
Longest session recorded (minutes:seconds) 198:45
Average number of searches completed per session 3.1
Retrievals per search - median 2.0
Retrievals per search - average 188.1
Retrievals per search - standard deviation 1142.8
Percent of searches completed with 0 results 34.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,365 41.0%
DISPLAY (excluding automatic displays) 759 22.8%
HELP 145 4.4%
EXPLAIN 158 4.7%
SET/RESET 161 4.8%
SHOW 17 0.5%
ADD ON (AND, OR, AND NOT) 19 0.6%
LOGON or LOGOFF 587 17.6%
COMMENT 0 0.0%
USE 3 0.1%
OTHER 115 3.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 83.8%
LONG 3.2%
TAGS 0.4%
FIELDS 1.4%
PERIODICALS 4.0%
COMMENTS 0.0%
Other 5.0%
Anthropological Literature Database Statistics continued:
_________________________________________________________
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 462 32.2% 113 24.5% 14 38.5 75.0
EXACT AUTHOR 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 333 23.2% 129 38.7% 6 122.0 677.2
EXACT TITLE 76 5.3% 36 47.4% 1 1.2 0.6
SUBJECT 423 29.5% 172 40.7% 34 785.0 2467.0
EXACT SUBJECT 24 1.7% 13 54.2% 48 147.9 218.7
EXACT JOURNAL 50 3.5% 18 36.0% 66 721.0 1425.1
DATE 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 12 0.8% 2 16.7% 3 5.7 5.7
EXACT PE 21 1.5% 3 14.3% 6 10.1 14.1
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 34 2.4% 14 41.2% 5 20.6 38.1
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 70 5.1% 32 45.7% 3 14.4 38.6
Single 1,295 94.9% 436 33.7% 13 302.3 1438.9
2.3 Avery Index to Architectural Per. Database Statistics
__________________________________________________________
Median session length (minutes:seconds) 7:26
Average session length (minutes:seconds) 11:48
Longest session recorded (minutes:seconds) 103:43
Average number of searches completed per session 3.2
Retrievals per search - median 3.0
Retrievals per search - average 109.4
Retrievals per search - standard deviation 1122.0
Percent of searches completed with 0 results 33.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 809 38.1%
DISPLAY (excluding automatic displays) 668 31.5%
HELP 50 2.4%
EXPLAIN 42 2.0%
SET/RESET 90 4.2%
SHOW 3 0.1%
ADD ON (AND, OR, AND NOT) 20 0.9%
LOGON or LOGOFF 340 16.0%
COMMENT 0 0.0%
USE 0 0.0%
OTHER 101 4.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
SHORT 83.4%
LONG 10.6%
TAGS 0.0%
FIELDS 0.4%
PERIODICALS 3.2%
COMMENTS 0.0%
Other 1.1%
Avery Index to Architectural Per. Database Statistics continued:
________________________________________________________________
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 165 19.3% 56 33.9% 13 28.0 43.9
EXACT AUTHOR 1 0.1% 0 0.0% 23 23.0 0.0
CORPORATE AUTHOR 1 0.1% 1 100% 0 0.0 0.0
EXACT CORPORATE 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 218 25.5% 84 38.5% 8 50.5 99.6
EXACT TITLE 2 0.2% 1 50.0% 8 8.0 0.0
SUBJECT 406 47.4% 127 31.3% 34 262.5 1907.8
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 11 1.3% 6 54.5% 436 1264.0 1541.2
CONFERENCE 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CONFERENCE 0 0.0% 0 0.0% 0 0.0 0.0
ABSTRACT 3 0.4% 0 0.0% 33 110.0 161.9
DATE 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 8 0.9% 0 0.0% 15 63.6 93.3
PLACE OF PUBL. 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 4 0.5% 1 25.0% 9 30.7 41.0
EXACT PE 12 1.4% 1 8.3% 6 31.7 85.1
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 25 2.9% 10 40.0% 7 21.9 33.8
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 41 5.1% 14 34.1% 8 40.7 75.6
Single 767 94.9% 259 33.8% 20 173.8 1428.8
2.4 History of Science & Technology Database Statistics
________________________________________________________
Median session length (minutes:seconds) 3:26
Average session length (minutes:seconds) 5:43
Longest session recorded (minutes:seconds) 42:41
Average number of searches completed per session 2.8
Retrievals per search - median 3.0
Retrievals per search - average 25.3
Retrievals per search - standard deviation 52.3
Percent of searches completed with 0 results 38.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 105 34.3%
DISPLAY (excluding automatic displays) 79 25.8%
HELP 17 5.6%
EXPLAIN 11 3.6%
SET/RESET 7 2.3%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 7 2.3%
LOGON or LOGOFF 66 21.6%
COMMENT 0 0.0%
USE 0 0.0%
OTHER 14 4.6%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.9%
SHORT 81.4%
LONG 3.9%
TAGS 1.0%
FIELDS 8.8%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 0.0%
History of Science & Technology Database Statistics continued:
______________________________________________________________
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 39 35.5% 18 46.2% 21 23.1 18.2
EXACT AUTHOR 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 35 31.8% 9 25.7% 9 43.3 82.8
EXACT TITLE 6 5.5% 2 33.3% 1 2.0 2.0
EXACT JOURNAL 1 0.9% 1 100% 0 0.0 0.0
SUBJECT 28 25.5% 11 39.3% 92 108.7 90.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
SERIES 0 0.0% 0 0.0% 0 0.0 0.0
EXACT SERIES 0 0.0% 0 0.0% 0 0.0 0.0
NOTES 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT CATEGORY 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 1 0.9% 1 100% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 6 5.8% 1 16.7% 233 186.6 103.8
Single 97 94.2% 39 40.2% 12 27.6 39.9
2.5 Index to Foreign Legal Periodical Database Statistics
__________________________________________________________
Median session length (minutes:seconds) 2:31
Average session length (minutes:seconds) 3:33
Longest session recorded (minutes:seconds) 8:14
Average number of searches completed per session 3.5
Retrievals per search - median 0.0
Retrievals per search - average 361.9
Retrievals per search - standard deviation 1230.4
Percent of searches completed with 0 results 64.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 39 47.6%
DISPLAY (excluding automatic displays) 8 9.8%
HELP 7 8.5%
EXPLAIN 5 6.1%
SET/RESET 2 2.4%
SHOW 2 2.4%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 18 21.9%
COMMENT 0 0.0%
USE 0 0.0%
OTHER 1 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
SHORT 100%
LONG 0.0%
TAGS 0.0%
FIELDS 0.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 0.0%
Index to Foreign Legal Periodical Database Statistics continued:
________________________________________________________________
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
DATE 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR 5 12.8% 3 60.0% 3 3.0 2.8
EXACT AUTHOR 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 8 20.5% 8 100% 0 0.0 0.0
EXACT TITLE 4 10.3% 3 75.0% 83 83.0 0.0
EXACT JOURNAL 1 2.6% 1 100% 0 0.0 0.0
SUBJECT 21 53.8% 10 47.6% 68 1275.1 2115.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
PLACE OF PUBL. 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 39 100% 25 64.1% 42 1008.2 1929.7
2.6 Chicano Database Statistics
________________________________
Median session length (minutes:seconds) 4:04
Average session length (minutes:seconds) 8:14
Longest session recorded (minutes:seconds) 84:39
Average number of searches completed per session 2.9
Retrievals per search - median 1.0
Retrievals per search - average 85.7
Retrievals per search - standard deviation 382.0
Percent of searches completed with 0 results 43.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 428 34.9%
DISPLAY (excluding automatic displays) 331 27.0%
HELP 79 6.4%
EXPLAIN 61 5.0%
SET/RESET 35 2.9%
SHOW 7 0.6%
ADD ON (AND, OR, AND NOT) 2 0.2%
LOGON or LOGOFF 230 18.7%
COMMENT 0 0.0%
USE 3 0.2%
OTHER 51 4.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.7%
SHORT 85.5%
LONG 9.6%
TAGS 0.0%
FIELDS 3.0%
PERIODICALS 0.7%
COMMENTS 0.0%
Other 0.5%
Chicano Database Statistics continued:
______________________________________
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 70 16.2% 25 35.7% 9 45.2 156.4
EXACT AUTHOR 0 0.0% 0 0.0% 0 0.0 0.0
CORPORATE AUTHOR 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CORPORATE 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 156 36.0% 68 43.6% 5 56.3 160.5
EXACT TITLE 10 2.3% 3 30.0% 2 1.7 0.8
ABSTRACT 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 182 42.0% 89 48.9% 38 313.5 756.6
EXACT SUBJECT 4 0.9% 1 25.0% 2 3.0 1.7
EXACT JOURNAL 5 1.2% 1 20.0% 95 92.5 96.5
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 1 0.2% 1 100% 0 0.0 0.0
LANGUAGE 3 0.7% 3 100% 0 0.0 0.0
PERIODICAL 2 0.5% 0 0.0% 111 111.0 152.7
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 6 1.4% 4 66.7% 1 1.0 0.0
Single 421 98.6% 183 43.5% 11 154.4 502.9
2.7 English Short Title Catalogue Database Statistics
______________________________________________________
Median session length (minutes:seconds) 9:42
Average session length (minutes:seconds) 15:28
Longest session recorded (minutes:seconds) 121:23
Average number of searches completed per session 3.3
Retrievals per search - median 5.0
Retrievals per search - average 179.7
Retrievals per search - standard deviation 770.7
Percent of searches completed with 0 results 23.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 398 28.8%
DISPLAY (excluding automatic displays) 515 37.2%
HELP 27 2.0%
EXPLAIN 48 3.5%
SET/RESET 55 4.0%
SHOW 5 0.4%
ADD ON (AND, OR, AND NOT) 36 2.6%
LOGON or LOGOFF 230 16.6%
COMMENT 0 0.0%
USE 1 0.1%
OTHER 68 4.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.8%
SHORT 50.2%
LONG 30.7%
TAGS 0.0%
FIELDS 0.5%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 6.9%
English Short Title Catalogue Database Statistics continued:
____________________________________________________________
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
SUBJECT 19 4.4% 6 31.6% 11 52.8 132.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR 112 25.9% 34 30.4% 9 32.8 52.7
EXACT AUTHOR 2 0.5% 2 100% 0 0.0 0.0
CORPORATE AUTHOR 5 1.2% 4 80.0% 2 2.0 0.0
EXACT CORP. AUTH 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 185 42.8% 39 21.1% 7 102.4 465.8
EXACT TITLE 27 6.3% 2 7.4% 3 16.3 22.9
UNIFORM TITLE 1 0.2% 1 100% 0 0.0 0.0
EXACT UNIFORM TI 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 23 5.3% 8 34.8% 19 112.0 156.8
PUBLICATION TYPE 3 0.7% 0 0.0% 167 521.0 727.7
PUBLISHER 6 1.4% 0 0.0% 528 401.0 282.7
IMPRINT YEAR 0 0.0% 0 0.0% 0 0.0 0.0
COUNTRY CODE 0 0.0% 0 0.0% 0 0.0 0.0
SHELFMARK 0 0.0% 0 0.0% 0 0.0 0.0
HOLDING LIBRARY 0 0.0% 0 0.0% 0 0.0 0.0
INDEXED BY 0 0.0% 0 0.0% 0 0.0 0.0
NOTES 1 0.2% 1 100% 0 0.0 0.0
PLACE OF PUBL 0 0.0% 0 0.0% 0 0.0 0.0
DATE 36 8.3% 4 11.1% 192 1666.5 2158.5
LANGUAGE 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 7 1.6% 2 28.6% 1 1.0 0.0
PERIODICAL 5 1.2% 1 20.0% 6 15.0 19.4
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 34 8.5% 8 23.5% 11 51.0 64.6
Single 364 91.5% 88 24.2% 9 271.7 953.3
3.0 Error, EXPLAIN and HELP statistics (All RLG-Z39.50 databases)
__________________________________________________________________
Percent of commands that contained errors 12.1%
Ten most frequent errors:
1. First word of command is invalid 26.4%
2. NS command - no next screen 23.3%
3. FIND command with invalid index name 9.5%
4. Index invalid in current database 4.8%
5. DISPLAY command contains invalid word 3.6%
6. PS command - no previous screen 2.9%
7. Valid command at an inappropriate time 2.7%
8. Z39.50 host unable to process search 1.9%
9. Command contains escape or arrow key 1.3%
10. Search term missing from search command 1.2%
11. All others 22.2%
Ten most frequent EXPLAIN requests:
1. GUIDE (Z39.50 A&I DBS) 13.0%
2. LOCATE (Z39.50 DBS) 10.7%
3. FIND (Z39.50 DBS) 9.5%
4. INDEXES (ANTH DB) 8.9%
5. INDEXES (RCAT DB) 5.7%
6. COMMANDS (Z39.50 DBS) 5.5%
7. GUIDE (Z39.50 non-A&I DBS) 5.0%
8. INDEXES (ESTC DB) 4.3%
9. Unrecognized term 4.1%
10. LOCATE (Z39.50 DBS) 2.7%
11. All others 30.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.6%
2. First word of command is invalid 13.7%
3. FIND command with zero results 9.3%
4. FIND command with invalid index name 8.6%
5. F/BR with index invalid in current DB 7.2%
6. DISPLAY command-complete in one screen 6.7%
7. FIND command retrieves 1 book 3.5%
8. DISPLAY command - middle of >1 screen 2.5%
9. DISPLAY command-first of >1 screen 2.4%
10. DISPLAY command - last of >1 screen 2.4%
11. All others 17.3%
Ten most frequent SHOW requests:
1. HISTORY 71.4%
2. SEARCH 15.9%
3. SETTINGS (Z39.50 DBS) 3.2%
4. GLOSSARY 2.4%
5. Z39.50 NEWS 1.6%
6. SYSTEM NEWS 1.6%
7. 0423 0.8%
8. EXPERIMENT 53 0.8%
9. LOCAL INFORMATION 0.8%
10. DATABASES 0.8%
11. All others 0.8%