MARC 21/Bibliographic Data/Leader

Die Datensatzkennung (engl. Leader) ist ein festes Feld, welches die ersten 24 Zeichenpositionen (00-23) jedes Datensatzes umfasst und Informationen für die Verarbeitung des Datensatzes enthält.

Position	Beschreibung (Englisch)	Beschreibung (Deutsch)
00-04	Record length	Länge des Datensatzes. Diese Positionen enthalten eine vom Rechner erzeugte fünfstellige numerische Zeichenfolge, welche die Länge des gesamten Datensatzes angibt. Die Nummer ist rechtsbündig, wobei linksseitig fehlende Positionen mit Nullen besetzt sind..
05	Record status a - Increase in encoding level c - Corrected or revised d - Deleted n - New p - Increase in encoding level from prepublication
06	Type of record a - Language material c - Notated music d - Manuscript notated music e - Cartographic material f - Manuscript cartographic material g - Projected medium i - Nonmusical sound recording j - Musical sound recording k - Two-dimensional nonprojectable graphic m - Computer file o - Kit p - Mixed materials r - Three-dimensional artifact or naturally occurring object t - Manuscript language material
07	Bibliographic level a - Monographic component part b - Serial component part c - Collection d - Subunit i - Integrating resource m - Monograph/Item s - Serial
08	Type of control # - No specified type a - Archival
09	Character coding scheme # - MARC-8 a - UCS/Unicode
10	Indicator count 2 - Number of character positions used for indicators
11	Subfield code count 2 - Number of character positions used for a subfield code
12-16	Base address of data [number] - Length of Leader and Directory
17	Encoding level # - Full level 1 - Full level, material not examined 2 - Less-than-full level, material not examined 3 - Abbreviated level 4 - Core level 5 - Partial (preliminary) level 7 - Minimal level 8 - Prepublication level u - Unknown z - Not applicable
18	Descriptive cataloging form # - Non-ISBD a - AACR 2 c - ISBD punctuation omitted i - ISBD punctuation included n - Non-ISBD punctuation omitted u - Unknown
19	Multipart resource record level # - Not specified or not applicable a - Set b - Part with independent title c - Part with dependent title
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

(Stand: 21.2.2109)

Weblinks

Herausgeber	Sprache	Webseitentitel	Anmerkungen
Library of Congress	eng	Leader (NR)wbm	Offizielle Webseite