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231 Характеристики цифрових файлів

3306 байтів додано, 13:08, 2 липня 2018
нема опису редагування
==Визначення поля==
 
This field contains statements relating to the characteristics of a digital file, i.e. technical specifications
relating to the digital encoding of text, image, audio, video, and other types of data in a resource. This
information could also be recorded in field 215 (Physical Description) subfield $c (Other Physical Details).
==Наявність==
 
Факультативне. Повторюється.
 
==Індикатори==
 
Індикатор 1: пробіл (не визначено)
 
Індикатор 2: пробіл (не визначено)
 
==Підполя==
 
===$a File type===
 
A general type of data content encoded in a computer file (EX 1, 2, 3).
 
Повторюється.
 
===$b Encoding standard===
 
A schema, standard, etc., used to encode the digital content of a resource (EX 1, 2, 3).
 
Повторюється.
 
===$c Version of encoding standard===
 
The version of the standard recorded in $b (EX 2).
 
Повторюється.
 
===$d Details of encoding standard===
 
Details of the standard recorded in $b (EX 2).
 
Повторюється.
 
===$e File size===
 
Number of bytes in a digital file (EX 2).
 
Повторюється.
 
===$f Resolution===
 
The smallest measuring unit used to register data for a computer image, expressed as dots per
inch, pixels per line, or lines per millimetre. It indicates the amount of detail found in one pixel of
the image (EX 4).
 
Повторюється.
 
===$g Regional encoding===
 
A code identifying the region of the world for which a digital file has been encoded on a carrier
and preventing that carrier from being played on a player sold in a different region. (EX 3).
 
Повторюється.
 
===$h Encoded bitrate===
 
The quantity of digital data that are conveyed or processed per unit of time, usually expressed
using the bits per second unit or one of its multiples. (EX 1).
 
Повторюється.
 
===$2 Source===
 
A code identifying a controlled list of terms used as a source for the data, if any.
 
Не повторюється.
 
===$6 Interfield linking data===
 
Повторюється.
 
==Примітки до змісту поля==
 
Multiple values from the same source vocabulary may be recorded in the same field in separate
occurrences of subfields. Terms from different source vocabularies are recorded in separate occurrences
of the field.
 
==Пов'язані поля==
 
*135 CODED DATA FIELD: ELECTRONIC RESOURCES
*215 PHYSICAL DESCRIPTION
:Especially $a Specific material designation and extent of the item and $c Other physical details.
*336 TYPE OF ELECTRONIC RESOURCE NOTE
*337 SYSTEM REQUIREMENTS NOTE (ELECTRONIC RESOURCES)
 
==Examples==
 
EX 1
: 231 ##$aAudio file$bmp3$g32 kbps
 
EX 2
: 231 ##$aFichier texte$bEPUB$c3.0$d$dformat fixe$e1249 Ko
 
EX 3
: 231 ##$aVideo file$bDVD video$gregion 2
 
EX 4
: 231 ##$aFile di immagini$bJPEG$f3.6 megapixel
 
EX 5
: 231 ##$aImage file$bJPEG$e3 Mo$2rda
 
EX 6
: 231 ##$aImage file$2rda
:231 ##$bQ2195$e3 Mo$2wikidata
:The term used for the File type is taken from RDA list of terms, whereas the one used for the
:Encoding format comes from Wikidata (http://www.wikidata.org). As subfield $2 (Source) is not repeatable, the information was split and recorded in two separate 231 fields.
 
EX 7
: 231 ##$aText file$bASCII$2rda
 
EX 8
: 231 ##$aProgram file$bFORTRAN$c95
== Див. також ==