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Dubyk перейменував сторінку з Hold/Структура формату на Hold / Структура формату
==2. FORMAT STRUCTUREСтруктура формату==
UNIMARC is designed according to an agreed set of principles. These have been adopted for
''UNIMARC Holdings Format''.
==2.1 General Structure==
UNIMARC is a specific implementation of [[wikipedia:uk:ISO 2709|ISO 2709]], an international standard that specifies the
structure of records containing bibliographic data. It specifies that every bibliographic record prepared
for exchange conforming to the standard must consist of:
:- a '''RECORD LABELRecord label''' consisting of 24 characters;:- a '''DIRECTORYDirectory''' consisting of a 3-digit tag of each data field, along with its length and its starting character position relative to the first data field;:- '''DATA FIELDSData fields''' of variable length, each separated by a field separator, with the following layout:
{| class="wikitable"
|-
| RECORD LABEL Record label || DIRECTORY Directory || DATA FIELDS Data fields|| R/T
|}
:R/T = Record Terminator
[[wikipedia:uk:ISO 2709 |ISO 2709]] further specifies that the data in fields may optionally be preceded by indicators and
subdivided into subfields. UNIMARC, as an implementation, uses the following specific options
allowed under [[wikipedia:uk:ISO 2709|ISO 2709]].
For general information on the format structure see UNIMARC Manual: [[UNIMARC для бібліографічних записів|Bibliographic Format]], [[Структура формату|3Format Structure]].
==2.2 Functional Blocks==
indicates the block of the field.
:[[hold/0XX|0-- Identification Block]]: contains numbers that identify the record or the holding.:[[hold/1XX|1-- Coded Information Block]]: contains fixed length data elements (usually coded) describing various aspects of the record or data.:[[hold/2XX|2-- Location and access block]]: contains information that identifies the institution, physical site or collection at which a bibliographic unit is located or from which it may be available.:[[hold/3XX|3-- Note Block]]: contains notes, intended for public display, that contribute to the identification of the item described in the holdings record.:[[hold/5XX|5 --Extent of Holdings Block]]: contains information for caption, pattern, enumeration and chronology of a specific bibliographic item (basic or secondary unit) for which a location is to be made.:[[hold/7XX|7-- Responsibility Block]]: contains a form of responsibility heading related to the item described in the holdings record.:[[hold/8XX|8-- Source Information Block]]: contains the source of the record, and cataloguer's notes about the data not intended for public display.:[[hold/9XX|9-- National Use Block]]: contains data local to the originator of the record. Field tags will not be defined in the ''UNIMARC Holdings Format '' for intersystem exchange.
==2.3 Data Fields Set of Principles==
(1) Tags should identify a field in two respects: : i) the type of character string (e.g., location and callnumber) and :ii) the function the character string performs in the record (e.g., levels). Assigningspecific values to the character positions of the tags will show these aspects. Tags may be both
numeric and alphabetic. First assignment will be numeric values, expanded to alphabetic values
(lower case preferred) when required.
values when required. Subfield identifiers will be given values for identification rather than for file
arrangement. Apart from subfield $6 which, when present, must always be the first subfield in the
field, there will be no specified order for subfield identifiers, as order is determined by the data. [https://www.iso.org/standard/18372.html ISO10324 ] prescribes the sequence and format of data elements in order to ensure consistent recording and
interpretation; however it does not prescribe the sequence in which data areas are to be displayed in a
holdings statement.