COMARC/B Format for Bibliographic Data

PDFCOMARC/BOctober2020

230 Electronic resource characteristics

This field contains information on the file characteristics pertaining to the type and extent of an electronic resource. It corresponds to the ISBD(ER) Type and Extent of Resource Area, and it is mandatory for remote access electronic resources.

Subfields & repeatability

FIELD/SUBFIELDREPEATABILITY
230Electronic resource characteristicsr
aDesignation and extent of filenr

Indicators

Indicator values are not defined.

SUBFIELDS

230a Designation and extent of file

The designation of the file identifies the particular type of file(s) which constitutes the work. Designation of file type is mandatory.

The extent of file consists of the number of files that make up the content of the data or the program. Additional measures of extent may be added as appropriate (see examples 1, 3, 4, 5, 6). Extent of file is optional.

The designation and extent of the file is given in the language of the bibliographic agency. Recommended terms are given in ISBD(ER).

NOTES ON FIELD CONTENTS

Each statement of extent is enclosed in round brackets after the designation of the file (see examples 1, 2, 3, 4, 5, 6). The number of files constituting the content of the data or program is given in Arabic numerals. The number of records and/or bytes may be given for a data file (see examples 3, 5, 6) and the number of statements and/or bytes may be given for a program (see examples 1, 4, 5, 6). For a multi-part file, the number of records and/or bytes or the number of statements and/or bytes may be given for each file (see examples 5, 6). The number of records and/or bytes or the number of statements and/or bytes may be approximated (see example 4). Repeatable when the file characteristics of more than one electronic resource are described in a single record.

RELATED FIELDS

135ELECTRONIC RESOURCES
This field contains coded data relating to electronic resources (see examples 7, 8, 9, 10).

EXAMPLES

  1. 230⊔⊔aComputer program (1 file : 1985 statements)
    (A program file with 1985 statements.)
  2. 230⊔⊔aComputer data (5 files) and programs (15 files)
    (Five databases and fifteen program files.)
  3. 230⊔⊔aComputer data (3 files : 800 records, 3150 bytes) and computer data (7 files)
    (Three databases with 800 records and seven databases without detailed statement.)
  4. 230⊔⊔aComputer program (2 files : ca. 650 statements each)
    (Every program file contains approximately 650 statements.)
  5. 230⊔⊔aComputer data (2 files : 729 records each) and programs (3 files : 7260, 3450, 2518 bytes)
    (Two databases and three programs. The extent of single databases is also stated.)

  6. *

    230⊔⊔aBesedilni podatki (1 datoteka : 382 KB) in program za poizvedovanje (2 datoteki : 182, 99 KB)
    (A remote access electronic resource. It contains data elements and a program; both source designations are connected with a conjunction "in".)

  7. *

    135⊔⊔av bi
    230⊔⊔aInteraktivni multimediji
    (A record for an interactive web page containing multimedia. The data in field 230 must correspond to the coded data entered in field 135.)

  8. *

    135⊔⊔av bh
    215⊔⊔a1 optični disk (CD-ROM) d12 cm
    230⊔⊔aBesedilni podatki in programi
    (Field 230 may be entered also for local accessed electronic resources. The data in fields 215 and 230 must correspond to the coded data entered in field 135.)

  9. *

    135⊔⊔ad bi
    230⊔⊔aE-časopis
    (A record for a web journal. For the term "elektronski", the prefix "e-" is used.)

  10. *

    135⊔⊔ad bi
    230⊔⊔aE-knjiga
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