Auhtority rekordfej szerkesztése (szakasz)

== GUIDELINES FOR APPLYING CONTENT DESIGNATORS ==

:'''CHARACTER POSITIONS'''

::'''00-04 - Record length'''
:::Computer-generated, 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.

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::'''05 - Record status'''
:::Relationship of the record to a file.
:::Used for file maintenance purposes.

:::'''a - Increase in encoding level'''
::::Encoding level (Leader/17) of the record has been changed from o (Incomplete authority record) to n (Complete authority record).

:::'''c - Corrected or revised'''
::::Addition/change other than in the Encoding level code has been made to the record.

:::'''d - Deleted'''
::::Used when neither code s nor code x is applicable, or when an organization chooses not to use code s or x.
::::Some level of manual intervention may be needed to affect the change in bibliographic records because the deleted heading may or may not be carried as a 4XX See From Tracing field in other authority records and a 682 field explaining the delete may be present in the record marked for deletion.
									
:::::Leader/05 	d
:::::150 	##$aFruit processing
:::::682 	##$iThis heading has been replaced by the heading$aFruit-Processing,$ia heading not distributed because it uses a freefloating subdivision controlled by a pattern heading.

:::'''n - New'''
::::Record is a newly input record.

:::'''o - Obsolete'''
::::Record content is obsolete, but the record has not been deleted from a file.

:::'''s - Deleted; heading split into two or more headings'''
::::Record has been deleted from a file because the heading has been split into two or more headings, requiring a new authority record for each. The heading from the deleted record is included in each of the new authority records as a tracing in a 4XX See From Tracing field. This specialized delete value supports use of automated systems to carry out any necessary reviews, since when a heading is split, a computer cannot automatically replace the old heading in bibliographic records.
									
:::::Leader/05 	s
:::::150 	##$aBuddha and Buddhism
									
:::::Leader/05 	n
:::::100 	0#$aGautama Buddha
:::::450 	##$aBuddha and Buddhism
									
:::::Leader/05 	n
:::::150 	##$aBuddhism
:::::450 	##$aBuddha and Buddhism

:::'''x - Deleted; heading replaced by another heading'''
::::Record has been deleted from a file and that a new authority record in which the heading from the deleted record appears as a 4XX See From Tracing field has been added to the file. (In a system where authority control is linked to the bibliographic file, a computer can affect the one-to-one replacement indicated by code x without manual intervention.)
									
:::::Leader/05 	x
:::::150 	##$aOleomargarine
									
:::::Leader/05 	n
:::::150 	##$aMargarine
:::::450 	##$aOleomargarine

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::'''06 - Type of record'''
:::Characteristics and definitions of the components of the record.
:::'''z - Authority data'''
::::Content of the record constitutes an authority record. The specific kind of authority record is identified by the code in 008/09 (Kind of record).

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::'''07-08 - Undefined character positions'''
:::Both are undefined; each contains a blank (#).

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::'''09 - Character coding scheme'''
:::Coding scheme used affects the number of octets needed per character, the placement of non-spacing characters, and the use of escape sequences and may affect the character repertoire. Detailed information on the character sets used in MARC 21 records is contained in [http://www.loc.gov/marc/specifications/spechome.html MARC 21 Specifications for Record Structure, Character Sets, and Exchange Media].

:::''''#' - MARC-8'''
::::Character coding in the record uses the 8-bit character sets described in [http://www.loc.gov/marc/specifications/spechome.html MARC 21 Specifications for Record Structure, Character Sets, and Exchange Media]. Non-default character sets used are identified in field 066.

:::'''a - UCS/Unicode'''
::::Makes use of characters from the Universal Coded Character Set (UCS) (ISO 10646), or Unicode™, an industry subset.

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::'''10 - Indicator count'''
:::Computer-generated number 2 that indicates the number of indicators occurring in each 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 21, 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'''

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::'''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'''

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::'''12-16 - Base address of data'''
:::Computer-generated, five-character numeric string that specifies 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.
:::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'''

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::'''17 - Encoding level'''
:::Whether the authority record is complete.
:::A record, where complete or incomplete, that is being considered for modification after its initial creation is identified by code b (Record is being updated) in field 008/31 (Record update in process).

:::'''n - Complete authority record'''
::::Record meets national-level record requirements for content and content designation.

:::'''o - Incomplete authority record'''
::::Authority record is incomplete because it does not yet contain all the information needed for a complete record. The record may or may not meet the national-level record requirements.

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::'''18-19 - Undefined character positions'''
:::Both are undefined; each contains a blank (#).

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::'''20 - Length of the length-of-field portion'''
:::Always a 4.

:::'''4 - Number of characters in the length-of-field portion of a Directory entry'''

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::'''21 - Length of the starting-character-position portion'''
:::Always a 5.

:::'''5 - Number of characters in the starting-character-position portion of a Directory entry'''

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::'''22 - Length of the implementation-defined portion'''
:::In MARC 21, a Directory entry does not contain an implementation-defined portion.
:::Always a 0.

:::'''0 - Number of characters in the implementation-defined portion of a Directory entry'''

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::'''23 - Undefined'''
:::Undefined; always contains a 0.