MARC 21 field 007
- 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL
INFORMATION (R)
- 007--COMPUTER FILE
007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION (R)
This field contains special information about the physical characteristics
in a coded form. The information may represent the whole item or parts
of an item such as accompanying material.
The data elements in field 007 are positionally defined and the number
of character positions in field 007 depends upon the code contained in
007/00. Character position 00 contains a code that identifies the category
of material. The fill character (|) is not allowed in this position. The
fill character may be used in any other character position when the cataloging
agency makes no attempt to code the position.
The categories of material for which field 007 is applicable in bibliographic
records are presented in the following order in the field description:
map, globe, projected graphic, microform, nonprojected graphic, motion
picture, sound recording, text, videorecording, unspecified.
007--COMPUTER FILE
Used for all computer files (i.e., programs, data files, etc.) which usually
consists of digitized machine-readable data or program code intended to
be accessed, processed, or executed by computer.
Character Positions
- 00 - Category of material
- 01 - Specific material designation
A one-character code that indicates the class of material (usually the
class of physical object) to which an item belongs (e.g., a magnetic disc).
- a - Tape cartridge
- b - Chip cartridge
- c - Computer optical disc cartridge
- f - Tape cassette
- h - Tape reel
- j - Magnetic disc
- m - Magneto-optical disc
- o - Optical disc
- r - Remote
- u - Unspecified
- z - Other
- | - No attempt to code
- 02 - Undefined; contains a blank (#) or a fill character ( | ).
- 03 - Color
A one-character code that indicates whether the item is one color or multicolored.
- a - One color
- c - Multicolored
- g - Gray scale
- m - Mixed
- n - Not applicable
- u - Unknown
- z - Other
- | - No attempt to code
- 04 - Dimensions
A one-character code that indicates the dimensions of the item.
- a - 3 1/2 in.
- e - 12 in.
- g - 4 3/4 in. or 12 cm.
- i - 1 1/8 x 2 3/8 in.
- j - 3 7/8 x 2 1/2 in.
- n - Not applicable
- o - 5 1/4 in.
- u - Unknown
- v - 8 in.
- z - Other
- | - No attempt to code
- 05 - Sound
A one-character code that indicates whether the production of sound is
an integral part of a computer file.
- # - No sound (silent)
- a - Sound on medium
- u - Unknown
- | - No attempt to code
- 06-08 - Image bit depth
A three-character number specifying the exact bit depth of the scanned
image(s) that comprise the computer file, or a three-character alphabetic
code which indicates that the exact bit depth cannot be recorded. Since
the exact bit depth is useful, coding should not include missing digits
represented by hyphens (-). Three fill characters (|||) are used when
no attempt has been made to code this data element.
- 001-999 - Exact bit depth
- mmm - Multiple
- nnn - Not applicable
- --- - Unknown
- ||| - No attempt to code
- 09 - File formats
A one-character code that indicates whether the file(s) which comprise
the computer file are of the same format or type for digitally reformatted
materials.
- a - One
- m - Multiple
- u - Unknown
- | - No attempt to code
- 10 - Quality assurance target(s)
A one-character code that indicates whether quality assurance targets
have been included appropriately at the time of reformatting/creation.
- a - Absent
- n - Not applicable
- p - Present
- u - Unknown
- | - No attempt to code
- 11 - Antecedent/Source
A one-character code which gives information about the source of a digital
file important to the creation, use and management of digitally reformatted
materials.
- a - File reproduced from original
- b - File reproduced from microform
- c - File reproduced from computer file
- d - File reproduced from an intermediate (not microform)
- m - Mixed
- n - Not applicable
- u - Unknown
- | - No attempt to code
- 12 - Level of compression
A one-character code that indicates the kind of compression to which the
computer file has been subjected.
- a - Uncompressed
- b - Lossless
- d - Lossy
- m - Mixed
- u - Unknown
- | - No attempt to code
- 13 - Reformatting quality
A one-character code that indicates the reformatting quality; an overall
assessment of the physical quality of the computer file in relation to
its intended use. It can be used to judge the level of quality of a file,
and an institution's commitment to maintain its availability over time.
- a - Access
Indicates that the computer file is of a quality that will support current,
electronic access to the original item, but not sufficient to serve
as a preservation copy.
- n - Not applicable
- p - Preservation
Indicates that the computer file was created via reformatting to help
preserve the original item.
- r - Replacement
Indicates the computer file is of very high quality and, when printed
out, viewed on screen or played via a listening device, could serve
as a replacement should the original be lost, damaged, or destroyed.
- u - Unknown
- | - No attempt to code
|
serials@northwestern.edu