This field contains data for which there is no specific UNIMARC field. It is used when an agency is converting records from another format and wishes to retain elements in fields which have no equivalent.
Indicator 1: Type of field
0 Record Label
1 Variable control field (0-- fields without indicators or subfields)
This subfield will not be present if Indicator 1 has the value 0. This subfield can be used only once with the value Tag of the Source Format Field. All other $a subfields in this field have the values assigned by the field of the source format.
$b Indicators and Subfields of the Source Format Field
This subfield will contain the indicators, subfield identifiers and subfields of the original field in their original order. This subfield can be used only once with the value Indicators and Subfields of the Source Format Field. All other $b subfields in this field have the values assigned by the field of the source format.
$2 System Code
The name of the format used for the machine-readable record. For this field, $2 appears first. See Appendix H for codes. Not repeatable.
EX 1: 886 2#$2ukmarc$a083$b00$aRussia. Education$b- Biographies – Collections
There is no equivalent in UNIMARC for UKMARC's Verbal Feature Heading:
This block is reserved for national use by agencies where UNIMARC is the basis of the domestic format. It is recommended that fields in this block be excluded from international exchange media. In cases of difficulty, it would be a matter for international agreement as to whether particular types of data should be held in a local field.
Agencies using this block may if they wish come to an agreement over common use of fields; but this is optional.
All -9- and --9 fields throughout the format are reserved for national and local use; their definitions and indicator and subfield values remain undefined by the Permanent UNIMARC Committee. This is also true of indicator value 9 and subfield $9.