853 CAPTIONS AND PATTERN--BASIC BIBLIOGRAPHIC UNIT (R)
Indicators
First Compressability and expandability
0 Cannot compress or expand
1 Can compress but not expand
2 Can compress or expand
3 Unknown
Second Caption evaluation
0 Captions verified; all levels present
1 Captions verified; all levels may not be present
2 Captions unverified; all levels present
3 Captions unverified; all levels may not be present
Subfield Codes
$a First level of enumeration (NR)
$b Second level of enumeration (NR)
$c Third level of enumeration (NR)
$d Fourth level of enumeration (NR)
$e Fifth level of enumeration (NR)
$f Sixth level of enumeration (NR)
$g Alternative numbering scheme, first level of enumeration (NR)
$h Alternative numbering scheme, second level of enumeration (NR)
$i First level of chronology (NR)
$j Second level of chronology (NR)
$k Third level of chronology (NR)
$l Fourth level of chronology (NR)
$m Alternative numbering scheme, chronology (NR)
$t Copy (NR)
$u Bibliographic units per next higher level (R)
Number of parts
var Varies
und Undetermined
$v Numbering continuity (R)
c Number increments continuously
r Numbering restarts at the completion of the unit
$w Frequency (NR)
a Annual
b Bimonthly
c Semiweekly
d Daily
e Biweekly
f Semiannual
g Biennial
h Triennial
j Three times a month
m Monthly
q Quarterly
s Semimonthly
t Three times a year
w Weekly
$x Calendar change (NR)
Month
01-12
Day
01-31
Season
21 Spring
22 Summer
23 Autumn
24 Winter
$y Regularity pattern (NR)
Publication code
o Omitted
p Published
Chronology code definition
d Day
m Month
s Season
w Week
Chronology Code
Day of week
mo Monday
tu Tuesday
we Wednesday
th Thursday
fr Friday
sa Saturday
su Sunday
Season
21 Spring
22 Summer
23 Autumn
24 Winter
Day of month
01-31
Week of month
99 Last
98 Next to Last
97 Third to Last
00 Ever
01 First
02 Second
03 Third
04 Fourth
05 Fifth
Week
01-53
Month
01-12
$3 Materials specified (NR)
$8 Link and sequence number (NR)