The Leader is the first field of a bibliographic record. The Leader is fixed in
length at 24 character positions (00-23) consisting of data elements with coded
values.
See for descriptions of all character positions
00-23. See CODES for
UNBIS coded values.
Fixed field elements entered in the Leader include the following:
Positions 00-04: Record length. Computer-generated, five-character numeric
string that specifies the length of the entire record.
Position 05: Record status.
Position 06: One-letter code indicating the type of item being described.
If the item is essentially the equivalent of a print item but in electronic form,
use the same type code you would use for the print version. For 缅北禁地documents, use the code 玜� (language material) regardless of whether the format is printed material or an electronic resource.
Position 07: One-letter code indicating the bibliographic level.
Position 17: One-character code indicating the encoding level, i.e. the status of completion or fullness of the bibliographic record.
Position 18: One-letter code indicating the cataloguing form of the record.
Examples:
000 02227cam 2200517#a 4500
where:
Positions 00-04: 02227 is record length;
Position 05: c is record status (corrected or revised)
Position 06: a is type of the item (language material)
Position 07: m is bib. level (monograph/item)
Position 17: # is encoding level (full level)
Position 18: a is cataloguing form (AACR 2)
000 01063cem 2200325 a 4500
where:
Positions 00-04: 01063 is record length;
Position 05: c is record status (corrected or revised)
Position 06: e is type of the item (cartographic material)
Position 07: m is bib. level (monograph/item)
Position 17: is encoding level (blank)
Position 18: a is cataloguing form (AACR 2)
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