306  Playing Time (NR)

Record Type


Input Standards

Field (Full/Minimal)
1st Indicator  Undefined
blank character Undefined
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Playing time (R) Mandatory/Mandatory
ǂ6 Linkage (NR) System supplied/System supplied
ǂ8 Field link and sequence number (R) Optional/Optional


The duration of a sound recording, videorecording, etc., or the duration of the performance of a music manuscript or printed music if the duration is on the item. Use six character positions in subfield ǂa. The six positions represent the duration of a work in hours, minutes, and seconds. Use field 500 to enter duration information as a note. In such cases, you may enter field 306 and field 500 in the same record.

For information on punctuation, see the Punctuation section below.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank.

blank character


2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank.

blank character



ǂa Playing time

First and second positions are for the number of hours. The third and fourth positions are for the number of minutes. The fifth and sixth positions are for the number of seconds. Use the following guidelines:

  • Enter one exact hour as 60 minutes. Enter one exact minute as 60 seconds.
  • Enter any duration more than an hour in terms of hours, minutes, and seconds
  • Enter any duration more than one minute and less than one hour in terms of minutes and seconds

    Duration Enter
    1 hr. 006000
    75 min. 011500
    1 hr., 45 min. 014500
    1 min. 000060
    20 min., 16 sec. 002016
  • If a duration is expressed as a range, enter the higher number

    Duration Enter
    approximately 17:00-18:00 001800
  • If a sound recording or score has two or more pieces, enter the duration for each piece in a separate subfield ǂa. For example, two durations are 37 min., and 10 min., 50 seconds, enter:

    306     003700 ǂa 001050
ǂ6 Linkage

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.

ǂ8 Field link and sequence number

For information about subfield ǂ8, see Control Subfields.


Omit all punctuation in field 306.

306     010930

For more information on punctuation, including OCLC policy, see section 2.8, Punctuation.


Field 306 is not indexed.


For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 306.