Leader (NR)
MARC 21 Community Information
January 2000
Indicators and Subfield Codes
This field has no indicators or subfield codes; the data elements are positionally
defined.
Character Positions
00-04 - Record length
05 - Record status
c - Corrected or revised
d - Deleted
n - New
06 - Type of record
q - Community information
07 - Kind of data
n - Individual
o - Organization
p - Program or service
q - Event
z - Other
08 - Undefined character position
# - Undefined
09 - Character coding scheme
# - MARC-8
a - UCS/Unicode
10 - Indicator count
2 - Number of character positions used for indicators
|
11 - Subfield code length
2 - Number of character positions used for a subfield code
12-16 - Base address of data
[number] - Length of Leader and Directory
17-19 - Undefined character positions
# - Undefined
20 - Length of the length-of-field portion
4 - Number of characters in the length-of-field portion of a Directory entry
21 - Length of the starting-character-position portion
5 - Number of characters in the starting-character-position portion of a Directory
entry
22 - Length of the implementation-defined portion
0 - Number of characters in the implementation-defined portion of a Directory entry
23 - Undefined
0 - Undefined
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FIELD DEFINITION AND SCOPE
Fixed field that comprises the first 24 character positions (00-23) of each record and
provides information for the processing of the record.
Consists of data elements that contain numbers or coded values that define the
parameters for the processing of the record. Character positions 20-23 comprise the
Entry map for the Directory. They contain four one-character numbers that specify the
structure of the entries in the Directory. More detailed information about the structure
of the Leader is contained in MARC 21 Specifications for Record
Structure, Character Sets, and Exchange Media.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ CHARACTER POSITIONS
00-04 - Record length Five-character number equal to the length of the entire record, including itself
and the record terminator. The number is right justified and unused positions
contain zeros.
05 - Record status Relationship of the record to a file for file maintenance purposes.
c - Corrected or revised Addition or change has been made to the record.
d - Deleted Record has been deleted.
n - New Record is a newly input record.
06 - Type of record Characteristics and definitions of the components of the record.
q - Community information Record constitutes a community information record. Community information
records describe non-bibliographic resources that fulfill the information needs
of a community. The kind of data found in the community information record is
identified by the code in Leader/07.
07 - Kind of data Kind of data found in the record.
n - Individual Individual with a particular expertise (e.g., teacher, interpreter,
storyteller, civic leader).
o - Organization Organization or any group (e.g., corporation, association, club, agency).
p - Program or service Offering or activity of a group or institution which carries out the the
organization's purpose.
Examples include driver education, day care placement, toy collection drive,
blood bank.
q - Event Scheduled happening (e.g., a lecture, play, concert series, sporting contest,
festival, annual celebration, regularly scheduled meeting).
z - Other Entity other than those specified by the other defined codes (e.g., a facility
such as a planetarium on a university campus.
Note that separate records are not created for equipment. Information about
equipment available from a community information entity that is to be used at
the entity is recorded in subfield $e (Equipment Available) of field
311 (Meeting Rooms and Facilities Available); information about equipment
available from a community information entity that may be used outside of the
entity is recorded in field 312 (Equipment Available).
08 - Undefined character position Undefined; contains a blank (#).
09 - Character coding scheme Character coding scheme used in the record.
a - UCS/Unicode Character coding in the record makes use of characters from the Universal Coded
Character Set (UCS) (ISO 10646), or Unicode™, an industry
subset.
10 - Indicator count Computer-generated number 2 that indicates the number of character positions used
for indicators in a variable data field.
An indicator character position contains a code which conveys information that
interprets or supplements the data found in the field. In MARC, two character
positions at the beginning of each variable data field are reserved for
indicators; therefore, the Indicator count is always 2.
2 - Number of character positions used for indicators
11 - Subfield code length Computer-generated number 2 that indicates the number of character positions used
for each subfield code in a variable data field.
(Each data element in a variable data field is identified by a subfield code.) In
MARC 21, a subfield code consists of a delimiter ($) and a lowercase
alphabetic or numeric data element identifier; therefore, the Subfield code count
is always 2.
2 - Number of character positions used for a subfield code
12-16 - Base address of data Computer-generated, five-character numeric string that indicates the first
character position of the first variable control field in a record. The number is
right justified and each unused position contains a zero.
The number is the base from which the starting character position of all the other
fields in the record is addressed in the Directory. (The starting character
position in the Directory entry for each field of the record is relative to the
first character of the first variable control field rather than the beginning of
the record.) The Base address of data is equal to the sum of the lengths of the
Leader and the Directory, including the field terminator character at the end of
the Directory.
[number] - Length of Leader and Directory
17-19 - Undefined character positions Undefined three character positions; each contains a blank (#).
20 - Length of the length-of-field portion Always contains a 4.
4 - Number of characters in the length-of-field portion of a Directory entry
21 - Length of the starting-character-position portion Always contains a 5.
5 - Number of characters in the starting-character-position portion of a Directory
entry
22 - Length of the implementation-defined portion Always contains a 0.
In MARC 21, a Directory entry does not contain an implementation-defined
portion.
0 - Number of characters in the implementation-defined portion of a Directory entry
23 - Undefined
Undefined; always contains a 0.
0 - Undefined
INPUT CONVENTIONS
System-Generated Elements - The following Leader elements are usually system generated:
| 00-04 |
Logical record length |
| 08 |
Undefined character position |
| 09 |
Character coding scheme |
| 10 |
Indicator count |
| 11 |
Subfield code count |
| 12-16 |
Base address of data |
| 17-19 |
Undefined character positions |
| 20-23 |
Entry map |
It is common for default values in other Leader elements to be generated automatically
as well.
Capitalization - Alphabetic codes are input as lower case letters.