853 CAPTIONS AND PATTERN--BASIC BIBLIOGRAPHIC UNIT (R)
Indicators Undefined; each contains a blank (#) ALEPH uses a special subset of MARC 853/4/5 and 863/4/5 fields for prediction patterns for journals, in order to facilitate serials control and issue check-in:
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) $u Units per next higher level (R) Number of units $v Numbering continuity (R) c Number increments continuously r Numbering restarts at the completion of the unit $w Frequency (NR) Codes a Annual b Bimonthly (every two months) c Semiweekly (twice a week) d Daily e Biweekly (every two weeks) f Semiannual (twice a year) g Biennial (every two years) h Triennial (every three years) i Three times a week j Three times a month m Monthly q Quarterly s Semimonthly (twice a month) t Three times a year w Weekly Note: Frequency codes c, i, and j require a subfield y with specific dates--e.g., $$ypd0101,0110,0120,[etc.] Number A number may be used to specify the frequency provided that subfield y is also used. $y Regularity pattern (NR) Publication code o Omitted p Published Chronology code definition d Date D Day of week m Month s Season Chronology code N.B.: Multiple chronology codes are separated by a comma. A slash (/) is used to designate combined issues. Date To record the date, enter the number of the month (01-12) and the number of the day (01-31). For example, March 15 is recorded as 0315. Day of week 0 Sunday 1 Monday 2 Tuesday 3 Wednesday 4 Thursday 5 Friday 6 Saturday Month 01-12 Season 21 Spring (Mar.-May) 22 Summer (June-Aug.) 23 Autumn (Sept.-Nov.) 24 Winter (Dec.-Feb.) $8 Link number (NR)