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538  System Details Note (R)


Input Standards

Required if applicable/Required if applicable
1st Indicator  Undefined
blank character  Undefined
2nd Indicator  Undefined
blank character  Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards 
‡a System details note (NR) Mandatory/Mandatory
‡i Display text (NR) Optional/Optional
‡u Uniform Resource Identifier (R) Optional/Optional
‡3 Materials specified (NR) Optional/Optional
‡5 Institution to which field applies (NR) Required if applicable/Required if applicable


A note about the system information for the item. Such information includes the absence or presence of certain kinds of codes or the physical characteristics of a computer file such as blocking factors, mode of access, parity or recording densities.


For software, enter data such as computer requirements (e.g., computer manufacturer and model, memory requirements or operating system), peripheral requirements (e.g., number of disk or drum units, number of tape drives, number of terminals, or other peripheral devices, support software or related equipment) or software programming language.


For sound recordings and videorecordings, use for information about the trade name or recording system(s) (e.g., VHS), modulation frequency and number of lines of resolution.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank ( blank character ).
blank character Undefined 

2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank ( blank character ).
blank character Undefined 


‡a System details note   The entire text of the note.
538     Data written in extended ASCII character set.
538     Disk characteristics: Floppy disk, single sided, double density, soft sectored.
538     Mode of access: Electronic mail via Internet and BITNET; also available via FTP.
538     System requirements: IBM PC; 64K; color card; 1 disk drive, color monitor recommended.
538     Written in FORTRAN H with 1.5K source program statements.
538     Mode of access: World Wide Web.
‡i Display text   The text intended to be displayed preceding the other data contained in the field
538     Benchmark for Faithful Digital Reproductions of Monographs and Serials. Version 1. December 2002 ‡i Digital version conforms to: ‡u
‡u Uniform Resource Identifier   The Uniform Resource Identifier (URI), for example a URL or URN, provides electronic access data in a standard syntax. Use this data for automated access to an electronic item using one of the Internet protocols. Repeat subfield if digital object has multiple identifiers (URIs).

Substituting hexadecimal notation for diacritics and special characters in Uniform Resource Identifiers. When recording a URI in subfield ‡u, you may enter most of the spacing characters listed below as either characters or their hexidecimal equivalents. Consult the table below.

Note: Do not confuse the spacing characters listed below with their long-valid non-spacing counterparts. Use of the spacing characters will be limited almost exclusively to URLs.

Entry method Name Character Alternative entry (hex value)

Enter as character or hex value
Spacing circumflex/circumflex accent ^ %5E
Spacing underscore/low line 1   _ %5F
Spacing grave/grave accent ` %60
Spacing tilde/tilde ~ %7E
Enter as hex value only vertical bar n/a %7C

1   Because the Spacing Underscore may cause problems with MARC output, users may prefer to continue entering it with the hexidecimal value %5F.

‡3 Materials specified   The part of the described materials to which the field applies.
‡5 Institution to which field applies   MARC code of the institution or organization that holds the copy to which the data in the field applies. Data in the field may not apply to the universal description of the item or may apply universally to the item, but be of interest only to the location cited. See MARC Code List for Organizations (
538     ‡3 1-39 (1927-1965) ‡a Files for the images of individual pages are encoded in Aldus/Microsoft TIFF Version 6.0 using facsimile-compatible CCITT Group 4 compression. ‡5 NIC
538     ‡3 1-49 (1927-1975) ‡a Master and use copy. Digital Master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. ‡u ‡5 ICU


Field 538 prints as a note. Subfield ‡u does not print. See " 5xx Introduction" for more information.

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