MELVYL RLG-Z39.50 DATABASES TELNET STATISTICS
Time period: 05/01/99 through 05/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 485 737 1,222
Davis 427 2 429
Irvine 213 0 213
Los Angeles 180 440 620
Riverside 164 15 179
San Diego 38 83 121
San Francisco 43 1 44
Santa Barbara 394 118 512
Santa Cruz 421 61 482
Other - UC 15 59 74
Other-Network UC n/a 165 165
_______ ______ _____
2,380 1,681 4,061
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 31 503 2,946
2-4 a.m. 5 132 937
4-6 a.m. 15 42 353
6-8 a.m. 26 110 547
8-10 a.m. 310 852 7,037
10-12 a.m. 695 2,085 20,111
12-2 p.m. 787 2,444 19,097
2-4 p.m. 912 3,209 26,635
4-6 p.m. 623 2,078 20,286
6-8 p.m. 306 1,083 6,764
8-10 p.m. 223 814 6,325
10-12 p.m. 128 467 2,633
__________ __________ __________ _________________
Total: 4,061 13,819 113,671
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,812 2,439 4,251
Davis 1,227 8 1,235
Irvine 657 0 657
Los Angeles 701 1,474 2,175
Riverside 418 39 457
San Diego 125 202 327
San Francisco 151 3 154
Santa Barbara 1,429 377 1,806
Santa Cruz 1,262 183 1,445
Other - UC 38 140 178
Other-Network UC n/a 1,134 1,134
_______ ______ _____
7,820 5,999 13,819
Number of FIND commands by database
RLIN Bibliographic File 3,545
Anthropological Literature 4,754
Avery Index to Architectural Per. 1,519
History of Science & Technology 482
Index to Foreign Legal Periodical 107
World Law Index-Hispanic Legis 0
Handbook of Latin Amer. Studies 0
Chicano 1,803
English Short Title Catalogue 1,609
Total number of FIND commands 13,819
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 17,185 21,475 38,660
Davis 9,982 31 10,013
Irvine 4,906 0 4,906
Los Angeles 5,355 11,814 17,169
Riverside 4,997 520 5,517
San Diego 1,399 1,675 3,074
San Francisco 802 60 862
Santa Barbara 10,616 5,335 15,951
Santa Cruz 9,697 1,470 11,167
Other - UC 116 1,234 1,350
Other-Network UC n/a 5,002 5,002
_______ ______ _____
65,055 48,616 113,671
Number of Records Displayed by database
RLIN Bibliographic File 34,793
Anthropological Literature 38,653
Avery Index to Architectural Per. 12,567
History of Science & Technology 2,943
Index to Foreign Legal Periodical 375
World Law Index-Hispanic Legis 0
Handbook of Latin Amer. Studies 0
Chicano 15,048
English Short Title Catalogue 9,292
Total number of Records Displayed 113,671
1.4 Relative Use of Databases
______________________________
Relative use of RLG-Z39.50 databases: Sessions Percentage
RLIN Bibliographic File 1,248 30.7%
Anthropological Literature 1,398 34.4%
Avery Index to Architectural Per. 430 10.6%
History of Science & Technology 141 3.5%
Index to Foreign Legal Periodical 50 1.2%
World Law Index-Hispanic Legis 0 0.0%
Handbook of Latin Amer. Studies 0 0.0%
Chicano 549 13.5%
English Short Title Catalogue 245 6.0%
Percent of searches done in the RCAT database 25.7%
Percent of searches done in the ANTH database 34.4%
Percent of searches done in the ARCH database 11.0%
Percent of searches done in the HSCI database 3.5%
Percent of searches done in the FLEG database 0.8%
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 13.0%
Percent of searches done in the ESTC database 11.6%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.6
Standard deviation in seconds 6.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.9
Standard deviation in seconds 4.2
2.1 RLIN Bibliographic File Database Statistics
________________________________________________
Median session length (minutes:seconds) 12:07
Average session length (minutes:seconds) 15:18
Longest session recorded (minutes:seconds) 309:42
Average number of searches completed per session 2.8
Retrievals per search - median 3.0
Retrievals per search - average 160.2
Retrievals per search - standard deviation 3003.9
Percent of searches completed with 0 results 28.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,364 32.3%
DISPLAY (excluding automatic displays) 4,248 40.8%
HELP 135 1.3%
EXPLAIN 168 1.6%
SET/RESET 782 7.5%
SHOW 43 0.4%
ADD ON (AND, OR, AND NOT) 181 1.7%
LOGON or LOGOFF 1,118 10.7%
COMMENT 0 0.0%
USE 17 0.2%
OTHER 364 3.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.4%
SHORT 57.3%
LONG 18.4%
TAGS 0.2%
FIELDS 3.0%
PERIODICALS 1.9%
COMMENTS 0.0%
Other 11.8%
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 1,186 31.8% 275 23.2% 19 100.4 313.3
EXACT AUTHOR 24 0.6% 8 33.3% 41 116.9 326.7
CORPORATE AUTHOR 28 0.8% 5 17.9% 14 97.7 278.8
EXACT CORPORATE 1 0.0% 1 100% 0 0.0 0.0
TITLE WORD 1,282 34.4% 393 30.7% 6 340.4 5646.8
EXACT TITLE/SERI 839 22.5% 280 33.4% 3 86.2 772.3
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 159 4.3% 44 27.7% 28 1056.1 5018.8
EXACT SUBJECT 6 0.2% 1 16.7% 30 366.0 742.8
SERIES 27 0.7% 14 51.9% 8 51.7 130.2
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
FORM 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 6 0.2% 0 0.0% 159 238.5 314.4
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 0 0.0% 0 0.0% 0 0.0 0.0
MUSIC PUBLISHER 0 0.0% 0 0.0% 0 0.0 0.0
ACCESSION NUMBER 1 0.0% 0 0.0% 1 1.0 0.0
PLACE OF PUBL. 3 0.1% 0 0.0% 20 18.3 11.6
UNIFORM TITLE 1 0.0% 0 0.0% 31 31.0 0.0
XOT 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 50 1.3% 16 32.0% 4 20.5 49.4
EXACT PE 16 0.4% 5 31.3% 4 13.4 27.0
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 99 2.7% 34 34.3% 5 31.8 98.7
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 374 11.2% 124 33.2% 5 50.5 190.2
Single 2,967 88.8% 822 27.7% 10 255.8 3845.3
2.2 Anthropological Literature Database Statistics
___________________________________________________
Median session length (minutes:seconds) 5:32
Average session length (minutes:seconds) 9:31
Longest session recorded (minutes:seconds) 86:34
Average number of searches completed per session 3.4
Retrievals per search - median 3.0
Retrievals per search - average 266.2
Retrievals per search - standard deviation 3504.5
Percent of searches completed with 0 results 37.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,610 39.3%
DISPLAY (excluding automatic displays) 2,892 24.7%
HELP 499 4.3%
EXPLAIN 622 5.3%
SET/RESET 469 4.0%
SHOW 57 0.5%
ADD ON (AND, OR, AND NOT) 144 1.2%
LOGON or LOGOFF 1,912 16.3%
COMMENT 1 0.0%
USE 5 0.0%
OTHER 516 4.4%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 83.1%
LONG 5.3%
TAGS 1.6%
FIELDS 1.1%
PERIODICALS 3.3%
COMMENTS 0.0%
Other 2.2%
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 1,345 28.2% 320 23.8% 18 43.2 112.9
EXACT AUTHOR 2 0.0% 2 100% 0 0.0 0.0
TITLE WORD 1,248 26.2% 495 39.7% 7 92.3 443.5
EXACT TITLE 117 2.5% 66 56.4% 1 31.5 134.0
SUBJECT 1,735 36.4% 782 45.1% 26 1111.5 7670.8
EXACT SUBJECT 87 1.8% 49 56.3% 197 1358.4 5440.8
EXACT JOURNAL 65 1.4% 20 30.8% 273 695.2 1143.2
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 62 1.3% 18 29.0% 10 98.7 246.0
EXACT PE 19 0.4% 1 5.3% 4 28.8 82.3
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 91 1.9% 36 39.6% 4 15.3 34.3
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 169 3.7% 75 44.4% 3 13.0 30.5
Single 4,433 96.3% 1,639 37.0% 17 451.3 4558.7
2.3 Avery Index to Architectural Per. Database Statistics
__________________________________________________________
Median session length (minutes:seconds) 7:20
Average session length (minutes:seconds) 10:29
Longest session recorded (minutes:seconds) 85:59
Average number of searches completed per session 3.5
Retrievals per search - median 3.0
Retrievals per search - average 136.2
Retrievals per search - standard deviation 1345.6
Percent of searches completed with 0 results 36.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,492 35.0%
DISPLAY (excluding automatic displays) 1,495 35.0%
HELP 143 3.4%
EXPLAIN 144 3.4%
SET/RESET 223 5.2%
SHOW 15 0.4%
ADD ON (AND, OR, AND NOT) 27 0.6%
LOGON or LOGOFF 518 12.1%
COMMENT 0 0.0%
USE 3 0.1%
OTHER 206 4.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.8%
SHORT 89.5%
LONG 6.0%
TAGS 0.0%
FIELDS 0.9%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 1.3%
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 188 12.3% 81 43.1% 14 29.4 44.4
EXACT AUTHOR 0 0.0% 0 0.0% 0 0.0 0.0
CORPORATE AUTHOR 11 0.7% 10 90.9% 1 1.0 0.0
EXACT CORPORATE 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 400 26.1% 137 34.2% 11 70.2 177.3
EXACT TITLE 18 1.2% 6 33.3% 29 201.9 499.9
SUBJECT 830 54.2% 291 35.1% 20 273.8 2130.4
EXACT SUBJECT 11 0.7% 9 81.8% 693 692.5 936.9
EXACT JOURNAL 22 1.4% 8 36.4% 961 1192.6 1264.2
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 2 0.1% 0 0.0% 3 3.0 1.4
DATE 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 16 1.0% 3 18.8% 179 134.7 117.3
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 24 1.6% 11 45.8% 12 1264.2 4207.0
EXACT PE 2 0.1% 0 0.0% 93 92.5 128.0
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 6 0.4% 2 33.3% 7 13.0 14.0
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 38 2.6% 12 31.6% 6 73.2 103.8
Single 1,451 97.4% 533 36.7% 15 222.6 1723.9
2.4 History of Science & Technology Database Statistics
________________________________________________________
Median session length (minutes:seconds) 4:21
Average session length (minutes:seconds) 8:25
Longest session recorded (minutes:seconds) 53:07
Average number of searches completed per session 3.4
Retrievals per search - median 1.0
Retrievals per search - average 114.3
Retrievals per search - standard deviation 752.1
Percent of searches completed with 0 results 47.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 467 38.2%
DISPLAY (excluding automatic displays) 308 25.2%
HELP 70 5.7%
EXPLAIN 69 5.6%
SET/RESET 42 3.4%
SHOW 1 0.1%
ADD ON (AND, OR, AND NOT) 15 1.2%
LOGON or LOGOFF 203 16.6%
COMMENT 0 0.0%
USE 1 0.1%
OTHER 48 3.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
SHORT 85.1%
LONG 5.3%
TAGS 0.8%
FIELDS 0.5%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 4.2%
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 89 18.6% 48 53.9% 9 24.6 42.5
EXACT AUTHOR 2 0.4% 0 0.0% 8 7.5 9.2
TITLE WORD 130 27.1% 44 33.8% 4 33.6 103.8
EXACT TITLE 2 0.4% 2 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 237 49.5% 130 54.9% 35 445.6 1540.5
EXACT SUBJECT 15 3.1% 9 60.0% 9 354.8 834.5
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 1 0.2% 1 100% 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 1 0.2% 0 0.0% 18 18.0 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 2 0.4% 1 50.0% 37 37.0 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 12 2.6% 5 41.7% 1 3.3 4.8
Single 455 97.4% 225 49.4% 13 233.6 1076.9
2.5 Index to Foreign Legal Periodical Database Statistics
__________________________________________________________
Median session length (minutes:seconds) 3:10
Average session length (minutes:seconds) 6:00
Longest session recorded (minutes:seconds) 54:03
Average number of searches completed per session 2.1
Retrievals per search - median 0.0
Retrievals per search - average 144.7
Retrievals per search - standard deviation 854.9
Percent of searches completed with 0 results 64.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 105 35.1%
DISPLAY (excluding automatic displays) 39 13.0%
HELP 22 7.4%
EXPLAIN 24 8.0%
SET/RESET 7 2.3%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 2 0.7%
LOGON or LOGOFF 85 28.4%
COMMENT 0 0.0%
USE 0 0.0%
OTHER 14 4.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.5%
SHORT 80.8%
LONG 10.6%
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 14 13.2% 11 78.6% 3 12.3 17.0
EXACT AUTHOR 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 19 17.9% 10 52.6% 6 21.2 41.0
EXACT TITLE 3 2.8% 3 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 64 60.4% 39 60.9% 68 610.3 1712.5
EXACT SUBJECT 5 4.7% 5 100% 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 1 0.9% 0 0.0% 34 34.0 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 1 1.0% 0 0.0% 34 34.0 0.0
Single 104 99.0% 68 65.4% 23 429.2 1445.0
2.6 Chicano Database Statistics
________________________________
Median session length (minutes:seconds) 5:18
Average session length (minutes:seconds) 9:12
Longest session recorded (minutes:seconds) 110:19
Average number of searches completed per session 3.3
Retrievals per search - median 2.0
Retrievals per search - average 85.9
Retrievals per search - standard deviation 320.3
Percent of searches completed with 0 results 37.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,765 34.4%
DISPLAY (excluding automatic displays) 1,475 28.7%
HELP 277 5.4%
EXPLAIN 353 6.9%
SET/RESET 83 1.6%
SHOW 33 0.6%
ADD ON (AND, OR, AND NOT) 38 0.7%
LOGON or LOGOFF 900 17.5%
COMMENT 0 0.0%
USE 3 0.1%
OTHER 211 4.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
SHORT 76.8%
LONG 10.4%
TAGS 5.6%
FIELDS 0.7%
PERIODICALS 3.2%
COMMENTS 0.0%
Other 2.1%
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 271 15.1% 93 34.3% 9 28.9 54.8
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 398 22.2% 160 40.2% 8 49.7 205.2
EXACT TITLE 37 2.1% 15 40.5% 1 18.6 53.7
ABSTRACT 7 0.4% 4 57.1% 1 11.3 17.9
SUBJECT 899 50.1% 328 36.5% 32 189.0 464.6
EXACT SUBJECT 70 3.9% 47 67.1% 107 335.8 494.6
EXACT JOURNAL 29 1.6% 10 34.5% 528 874.9 989.3
ACCESSION NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 1 0.1% 0 0.0% 84 84.0 0.0
LANGUAGE 10 0.6% 5 50.0% 1 92.0 200.7
PERIODICAL 25 1.4% 7 28.0% 68 189.4 355.5
EXACT PE 43 2.4% 6 14.0% 11 19.2 29.4
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 5 0.3% 2 40.0% 56 71.3 64.4
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 1.9% 9 26.5% 10 39.4 90.0
Single 1,727 98.1% 659 38.2% 18 142.9 405.8
2.7 English Short Title Catalogue Database Statistics
______________________________________________________
Median session length (minutes:seconds) 12:13
Average session length (minutes:seconds) 21:16
Longest session recorded (minutes:seconds) 434:55
Average number of searches completed per session 6.6
Retrievals per search - median 8.0
Retrievals per search - average 201.5
Retrievals per search - standard deviation 1248.9
Percent of searches completed with 0 results 24.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,262 35.1%
DISPLAY (excluding automatic displays) 1,084 30.1%
HELP 60 1.7%
EXPLAIN 199 5.5%
SET/RESET 84 2.3%
SHOW 71 2.0%
ADD ON (AND, OR, AND NOT) 347 9.6%
LOGON or LOGOFF 402 11.2%
COMMENT 0 0.0%
USE 2 0.1%
OTHER 89 2.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 9.4%
SHORT 54.1%
LONG 25.8%
TAGS 0.4%
FIELDS 0.2%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 10.2%
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 349 21.5% 63 18.1% 52 159.9 453.0
EXACT SUBJECT 17 1.0% 5 29.4% 25 54.6 69.3
AUTHOR 131 8.1% 32 24.4% 20 107.3 246.7
EXACT AUTHOR 5 0.3% 4 80.0% 16 16.0 0.0
CORPORATE AUTHOR 4 0.2% 2 50.0% 894 894.0 0.0
EXACT CORP. AUTH 2 0.1% 1 50.0% 827 827.0 0.0
TITLE WORD 479 29.5% 117 24.4% 15 192.9 657.4
EXACT TITLE 27 1.7% 9 33.3% 6 35.3 64.1
UNIFORM TITLE 2 0.1% 1 50.0% 14 14.0 0.0
EXACT UNIFORM TI 2 0.1% 1 50.0% 14 14.0 0.0
KEYWORD 83 5.1% 21 25.3% 34 481.4 1751.3
PUBLICATION TYPE 13 0.8% 2 15.4% 929 5189.9 7822.1
PUBLISHER 84 5.2% 6 7.1% 71 226.4 400.7
IMPRINT YEAR 7 0.4% 1 14.3% 5 160.5 243.6
COUNTRY CODE 16 1.0% 12 75.0% 3,533 10180.0 15184.1
SHELFMARK 5 0.3% 3 60.0% 44 43.5 30.4
HOLDING LIBRARY 3 0.2% 2 66.7% 22 22.0 0.0
INDEXED BY 0 0.0% 0 0.0% 0 0.0 0.0
NOTES 1 0.1% 0 0.0% 12 12.0 0.0
PLACE OF PUBL 58 3.6% 5 8.6% 10 169.2 672.1
DATE 301 18.5% 43 14.3% 18 136.5 217.9
LANGUAGE 26 1.6% 10 38.5% 131 1500.6 2499.4
ACCESSION NUMBER 9 0.6% 6 66.7% 1 1.0 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 0.1% 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 349 27.7% 78 22.3% 8 95.8 540.1
Single 912 72.3% 185 20.3% 71 402.4 1806.4
3.0 Error, EXPLAIN and HELP statistics (All RLG-Z39.50 databases)
__________________________________________________________________
Percent of commands that contained errors 13.9%
Ten most frequent errors:
1. First word of command is invalid 33.6%
2. NS command - no next screen 16.9%
3. FIND command with invalid index name 11.2%
4. Index invalid in current database 7.3%
5. Valid command at an inappropriate time 2.5%
6. DISPLAY command contains invalid word 2.3%
7. PS command - no previous screen 2.3%
8. Search term missing from search command 1.3%
9. SAVE command issued from a Z39.50 db 1.0%
10. Command contains escape or arrow key 0.9%
11. All others 20.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (Z39.50 DBS) 22.8%
2. GUIDE (Z39.50 A&I DBS) 19.1%
3. FIND (Z39.50 DBS) 7.2%
4. INDEXES (ANTH DB) 5.7%
5. COMMANDS (Z39.50 DBS) 4.6%
6. INDEXES (ESTC DB) 4.4%
7. Unrecognized term 3.5%
8. GUIDE (Z39.50 non-A&I DBS) 2.8%
9. LOCATE (Z39.50 DBS) 2.4%
10. INDEXES (CHI DB) 1.8%
11. All others 25.6%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.4%
2. First word of command is invalid 15.6%
3. DISPLAY command-complete in one screen 8.3%
4. FIND command with invalid index name 8.3%
5. F/BR with index invalid in current DB 6.4%
6. DISPLAY command-first of >1 screen 6.4%
7. FIND command with zero results 6.0%
8. DISPLAY command - middle of >1 screen 4.8%
9. FIND command retrieves 1 book 3.2%
10. NS command - no next screen 1.9%
11. All others 14.6%
Ten most frequent SHOW requests:
1. HISTORY 55.7%
2. SEARCH 25.3%
3. SETTINGS (Z39.50 DBS) 5.4%
4. GLOSSARY 5.0%
5. SYSTEM NEWS 2.3%
6. Z39.50 NEWS 1.4%
7. G635 1.4%
8. LIBRARY NEWS 0.9%
9. 0405 0.5%
10. 0419 0.5%
11. All others 1.8%