element,used,min,max,mean
keyword,81,1,721,8.601
citation,100,2,421,3.5
titlStmt,100,2,421,3.488
titl,100,2,421,3.462
IDNo,100,1,421,2.847
notes,68,1,33871,2.316
distrbtr,94,1,4,2.256
distStmt,100,1,418,2.064
AuthEnty,100,1,338,2.049
holdings,46,1,421,1.935
collDate,90,1,162,1.929
distDate,89,1,419,1.909
nation,77,1,390,1.684
relStdy,3,1,352,1.645
otherMat,17,1,33870,1.625
labl,17,1,33870,1.625
geogCover,67,1,638,1.597
txt,16,1,33870,1.574
topcClas,38,1,76,1.568
abstract,100,1,13,1.348
prodStmt,96,1,2,1.253
rspStmt,100,1,2,1.134
timePrd,55,1,8,1.118
version,92,1,2,1.038
docDscr,100,1,2,1.024
codeBook,100,1,1,1
stdyDscr,100,1,1,1
stdyInfo,100,1,1,1
subject,100,1,1,1
sumDscr,100,1,1,1
dataAccs,100,1,1,1
useStmt,99,1,1,0.991
verStmt,94,1,1,0.94
method,94,1,1,0.94
dataColl,94,1,1,0.94
othrStdyMat,89,1,1,0.892
concept,16,1,80,0.862
relMat,12,1,200,0.802
contact,74,1,7,0.751
producer,71,1,7,0.751
setAvail,74,1,1,0.735
biblCit,60,1,33,0.635
depositr,62,1,6,0.627
prodPlac,62,1,1,0.618
sources,61,1,1,0.613
depDate,61,1,1,0.608
relPubl,13,1,417,0.606
anlyInfo,60,1,1,0.595
geoBndBox,52,1,29,0.525
northBL,52,1,29,0.524
eastBL,52,1,29,0.523
westBL,52,1,9,0.523
southBL,52,1,2,0.521
collMode,33,1,72,0.516
anlyUnit,25,1,24,0.467
restrctn,30,1,6,0.451
prodDate,42,1,2,0.445
sampProc,28,1,14,0.413
othId,15,1,130,0.396
copyright,24,1,5,0.308
timeMeth,23,1,6,0.304
fileDscr,27,1,8,0.286
dataKind,22,1,7,0.285
universe,21,1,6,0.251
fileTxt,16,1,38,0.182
fundAg,11,1,23,0.173
parTitl,14,1,7,0.17
othRefs,11,1,33,0.144
conditions,14,1,2,0.14
weight,13,1,3,0.134
ExtLink,10,1,23,0.111
dataCollector,10,1,12,0.107
avlStatus,9,1,1,0.088
verResp,9,1,1,0.087
dimensns,9,1,1,0.087
fileType,9,1,1,0.087
caseQnty,9,1,1,0.086
varQnty,9,1,1,0.086
grantNo,7,1,15,0.08
geogUnit,6,1,24,0.08
accsPlac,6,1,1,0.062
specPerm,6,1,1,0.061
subTitl,5,1,2,0.05
citReq,3,1,2,0.05
deposReq,3,1,2,0.05
altTitl,5,1,2,0.046
fileName,3,1,38,0.044
disclaimer,4,1,1,0.044
ConOps,4,1,4,0.044
cleanOps,4,1,1,0.043
deviat,3,1,1,0.03
collSize,3,1,1,0.03
serStmt,1,1,2,0.027
serName,1,1,2,0.027
serInfo,1,1,2,0.025
software,1,1,12,0.007
resInstru,0,1,1,0.003
dataSrc,0,1,31,0.002
targetSampleSize,0,1,1,0.002
sampleSize,0,1,1,0.002
dc:coverage,0,1,13,0.001
confDec,0,1,1,0.001
frequenc,0,1,1,0
respRate,0,1,1,0
srcOrig,0,1,1,0
collSitu,0,1,1,0
EstSmpErr,0,1,1,0
srcChar,0,1,1,0
sampleSizeFormula,0,1,1,0
actMin,0,1,1,0
srcDocu,0,1,1,0
origArch,0,1,1,0
complete,0,1,1,0
conOps,0,1,1,0
collectorTraining,0,1,1,0