Information:
Computer File Characteristics are used with
electronic resources and provide useful
information about the type and size of the
resource. This information is entered into the
256 tag in the MARC record. Electronic resources
include floppy disks, CD-ROMs and computer
files available on your local network or through
the Internet.
Chapter 9 of AACR2 covers electronic resources.
Rule 9.3 deals specifically with the file type
and resource area of the record. When the
information is available, designate whether the
electronic resource contains data or programs
(Rule 9.3B1). If it is readily available and can
be stated succinctly, enter information about
the size of the resource in parentheses following
the type of resource:
The 256 tag is no longer applied to electronic resources.
* Include the number of files
* For data give the number of records
* For programs give the number of
statements or bytes
The entire statement goes into subfield a.
Indicators
First Undefined
blank Undefined
Second Undefined
blank Undefined
Subfield
a Computer file characteristics (NR)
Punctuation
This tag ends with a period.
Examples:
256 _aElectronic data.
256 _aElectronic program.
256 _aElectronic data and programs.
256 _aElectronic programs (3 files).
256 _aElectrnic data (1 file : 95
records).
256 _aElectronic program (1 file : 210
statements).
256 _aElectronic data (1 file : 5428
bytes).
256 _aElectronic data (4 files : 138900,
9227, 102469, 114644 bytes) and
electronic program (1 file : 79065
bytes).
256 _aComputer data (1 file : 100 records,
138900 bytes).
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