5xx Fields

Contents   Fixed field   Access points   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx   Control subfields

556  Information About Documentation Note (R)

Record Type


Input Standards

Field (Full/Minimal)
1st Indicator  Display constant controller
blank character Documentation
8 No display constant generated
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Information about documentation note (NR) Mandatory/Mandatory
ǂz International Standard Book Number (R) Required if applicable/Required if applicable
ǂ6 Linkage (NR) System supplied/System supplied
ǂ8 Field link and sequence number (R) Optional/Optional


A note about the documentation of the described materials, such as code books that explain the contents and use of the file or a user's manual.

Use field 581 if the note is about the analysis, study, or use of the file.

For information on punctuation, see the Punctuation section below.

1st Indicator

Display constant controller. A value that controls the generation of the display constant preceding the note.

blank character

Documentation. The value that generates the display constant Documentation:.

556     "Technical Documentation for Computer Tapes, 1974 Census of Agriculture, County Reports and Miscellaneous Tables"

No display constant generated. The value that specifies that a display constant is not generated.

556 8   Documentation also available as FSWEC-77/0387-1

2nd Indicator

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

blank character



ǂa Information about documentation note

The entire text of the note.

556     1970 censuses of population file (A, B, or C) summary tape (sample). Arlington, Va. : Data Use and Access Laboratories, 1972
556     BASIC reference. Third edition. Boca Raton, Florida : IBM, ©1984
ǂz International Standard Book Number

For information about subfield ǂz, see Control Subfields.

556     Disaster recovery : a model plan for libraries and information centers ǂz 0959328971
556   8 Manual title: MacPoisson, instructional finite element analysis for solving Poisson's equation with the Macintosh, ©1989 ǂz 0940119102
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.


For records containing punctuation, follow these instructions:

  • Omit punctuation preceding each subfield unless the preceding subfield ends with an ellipsis, exclamation point, hyphen, period (following an abbreviation or initial), question mark, closing bracket, or closing parenthesis
  • Include incidental and ISBD punctuation needed within any subfields, e.g., commas, periods (following abbreviations or initials), etc.
  • Optionally, add a terminal period at the end of the field unless the last subfield ends with an ellipsis or period (following an abbreviation or initial)
556     BASIC reference. Third edition. Boca Raton, Florida : IBM, ©1984.

For records containing minimal or no punctuation, include incidental and ISBD punctuation needed within any subfields. Otherwise, omit the punctuation outlined above.

556     BASIC reference. Third edition. Boca Raton, Florida : IBM, ©1984

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


Field 556 is not indexed.


For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 556.

This page last revised: December 22, 2022