Leader – Main/master level

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Description of field M000 – Leader – Main/master level in the CBS MARC 21 database.

Additional MARC 21 documentation

For more MARC 21 documentation:

Library of Congress http://www.loc.gov/marc/bibliographic/bdleader.html
OCLC, Dublin https://www.oclc.org/bibformats/en/fixedfield.html

Char-acter	Descrizione	Explanation	CBS MARC tag /subf.	PICA+ tag / subf.	Comment	Import, online cataloguing and MARC 21 export
			M000	002L
00-04	Lunghezza del record	System generated	$a	$a	Although this subfield is not used in CBS MARC 21 currently, it has been defined in the CBS MARC 21 format for completeness.	During import: the record length is not put in subfield $a. Thus, it is ignored. During online cataloguing: the record length is not added. During export: the record length is not generated, but 5 blanks are added instead.
05	Record status	Variable	$b	$b		During import: if the record status is d - Deleted -, the value is kept, but if not, the record status value is changed into (or remains) c - Corrected or revised -. During online cataloguing: the following record status values can be added or updated: a, c, n or p, but value d is not allowed. During export: When tag 0240/ 001E - Source and date of offline deletion of main/master level data - is present, value d - Deleted - is generated. When the option record-status value is new, value n - New - is generated. Option record-status value new, corrected or deleted is generated by the pusher on basis of the log record and the target database. Thus, the record status is determined by the software. When the option record-status value is corrected, value c - Corrected or revised - is generated. When the option record-status value is deleted, value d - Deleted - is generated. Option record-status value deleted can be generated e.g. when – in the Master Record Model – position 4 of tag 0500 / 002@ - Bibliographic type and status - is changed from u / U - unique record - into s / S - slave record -, but this is dependent also on the structure of the target database. In all other cases, the record status is exported, but when the value is missing, the following value is generated: c - Corrected or revised -.
06	Type of record	Variable	$c	$c	Although this subfield is not used in CBS MARC 21 currently, it has been defined in the CBS MARC 21 format for completeness.	During import: the type of record value is put in subfield $c. During online cataloguing: all types of record values can be added or updated. During export: the type of record is exported. When the value is missing, the following value is generated: a - Language material -. If wanted, it is possible to make this more specific.
07	Bibliographic level	Variable	$d	$d	This has a close relation with, but is not the same as field 0500 / 002@ - Bibliographic type and status - subfield $0 position 2 - Bibliographic level -.	During import: the bibliographic level value is put in subfield $d. During online cataloguing: all bibliographic level values can be added or updated. During export: the bibliographic level value is exported. When the value is missing, value s - Serial - is generated, when at least one of the following tags is present: 310 - Current Publication Frequency - 321 - Former Publication Frequency - 362 - Dates of Publication and/or Sequential Designation - Value m - Monograph/Item - is used in other cases. If wanted, it is possible to make this more specific.
08	Type of control	Variable	$e	$e		During import: the type of control value is put in subfield $e. During online cataloguing: all types of control values can be added or updated. During export: the type of control value is exported. When the value is missing, blank (“No specified type”) is generated.
09	Character coding scheme	Variable	$f	$f	Although these subfields are not used in CBS MARC 21 currently, they have been defined in the CBS MARC 21 format for completeness.	During import: the value is not imported into subfield $f. Thus, it is ignored. During online cataloguing: the value cannot be added. During export: the value a - UCS/Unicode - is exported. NB Only Unicode/UTF8 is used in CBS.
10	Conteggio degli indicatori	Fixed value; 2 – Number of character positions used for indicators	$g	$g		During import: the value is not put in subfield $h. Thus, it is ignored. During online cataloguing: the value is not added. During export: value “2” is generated.
11	Subfield code count	Fixed value; 2 – Number of character positions used for a subfield code	$h	$h		During import: the value is not put in subfield $h. Thus, it is ignored. During online cataloguing: the value is not added. During export: value “2” is generated.
12-16	Indirizzo base dei dati	System generated; [number] – Length of Leader and Directory	$i	$i		During import: the value is not put in subfield $i. Thus, it is ignored. During online cataloguing: the value is not added. During export: the value is not generated, but instead, 5 blanks are generated.
17	Livello di codifica	Variable	$j	$j	It has a close relationship with, but is not the same as field 0500 / 002@ - Bibliographic type and status - subfield $0 position 3 - Encoding level -.	During import: the value is put in subfield $j. During import from WorldCat: the value is put in subfield $j, except for: Value I - Full-level input by OCLC participants - is changed into 1 - Full level, material not examined - Value K - Minimal-level input by OCLC participants - is changed into 2 - Less-than-full level, material not examined - Value L - Full-level input added from a batch process - is changed into 1 - Full level, material not examined - Value M - Less-than-full added from a batch process - is changed into 2 - Less-than-full level, material not examined - Value \| - No attempt to code - (default) is ignored. During online cataloguing: the value can be added or updated. During export: the value is exported. When the value is missing, u - Unknown - is generated. If wanted, it is possible to make this more specific. During export to WorldCat: Values # and 1 are changed into I - Full-level input by OCLC participants - Values 2, 3, 4, 5 and 7 are changed into K - Minimal-level input by OCLC participants - Values u and z are changed into 8 - Prepublication level - Value 8 remains 8 - Prepublication level - When the value is missing, 8 - Prepublication level - is generated. Only the encoding levels defined in LoC MARC are allowed; the additional encoding levels defined by OCLC are not allowed.
18	Scheda di catalogazione descrittiva	Variable	$k	$k		During import: the value is put in subfield $k. During import from WorldCat: the value is put in subfield $j, except for value \| - No attempt to code - which (as a default) is ignored. During online cataloguing: the value can be added or updated. During export: the value is exported. When the value is missing, u - Unknown - is generated.
19	Multipart resource record level	Variable	$l	$l		During import: the value is put in subfield $l. During import from WorldCat: the value is put in subfield $l. During online cataloguing: the value can be added or updated. During export: the value is exported. When the value is missing, blank (“Not specified or not applicable”) is generated.
20	Lunghezza della porzione di lunghezza di campo	Fixed value; 4 – Number of characters in the length-of-field portion of a Directory entry	$m	$m	Although these subfields are not used in CBS MARC 21 currently, they have been defined in the CBS MARC 21 format for completen ess.	During import: the value is not put in subfield $m. Thus, it is ignored. During online cataloguing: the value is not added. During export: value “4” is generated.
21	Length of the starting-character-position portion	Fixed value; 5 – Number of characters in the starting-character-position portion of a Directory entry	$n	$n		During import: the value is not put in subfield $m. Thus, it is ignored. During online cataloguing: the value is not added. During export: value “5” is generated.
22	Length of the implementation-defined portion	Fixed value; 0 – Number of characters in the implementation-defined portion of a Directory entry	$o	$o		During import: these values are not put in subfields $o and $p. Thus, they are ignored. During online cataloguing: these values are not added During export: value “0” is generated for both subfields.
23	Undefined	Fixed value; 0 – Undefined	$p	$p