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→Notes on Field Contents
::One character code that indicates the characteristics of and defines the components of the record.
::'''a ''' = Single-part
::Item which is complete in a single physical part.
::'''b ''' = Multipart
::Item which is complete, or intended to be complete in a finite number of separate physical parts.
::'''c ''' = Serial
::A continuing resource issued in a succession of discrete parts, usually bearing numbering, that has no predetermined conclusion.
::The following are examples of materials that are coded "s": journals, magazines, electronic journals, continuing directories, annual reports, newspapers, and monographic series.
::'''d ''' = Integrating resource
::Bibliographic item/resource that is added to or changed by means of updates that do not remain discrete and are integrated into the whole. ::Integrating resources may be finite or continuing.
::The following are examples of materials that are coded "d": updating loose-leafs, databases and updating Web sites.
::'''u ''' = Holdings type unknown
:'''7 Type of unit designator'''
::One character code that specifies the component of the item to which the following general holdings information and/or the extent of holdings pertain.
::<nowiki>#</nowiki> = Information not available
::'''a ''' = Basic bibliographic unit::'''b ''' = Secondary bibliographic unit : supplementary materials::'''c ''' = Secondary bibliographic unit : indexes::'''x ''' = Not applicable
:'''8 Type of copy statement'''
::'''a ''' = copy-specific statement
::Holdings statement for a single copy in a collection
::'''b ''' = Composite statement about multiple copies at a single location/sublocation
::Holdings statement about two or more copies held at a single location or sublocation
::'''c ''' = Composite statement about copies at two or more sublocations
::Holdings statement about copies at two or more sublocations consolidated into a single statement
:A one character code that indicates the level of specificity of the holdings statement. Codes 1, 2 and 3 reflect the requirements of Levels 1, 2 and 3 of ''Holdings Statements – Summary Level'' ([https://www.iso.org/standard/18372.html ISO 10324]). A single part item holdings statement is recorded at level 1. A multipart or serial item holdings statement may be recorded at any level.
::'''1 ''' = Level 1
:::Identifies the item and the holding institution. This level is sufficient for single -part items, but gives no indication of extent of holdings for multipart items or serial items.
::'''2 ''' = Level 2
:::Adds to level 1 general guidance as to the extent of an institution’s holdings.
::'''3 ''' = Level 3
:::Includes a statement of summary extent of holdings.
::'''m ''' = Mixed level
:::Indicates that the level of holdings statement is mixed, for example when the levels for retrospective and current holdings differ.
::'''u ''' = Unknown::'''z ''' = Other level
'''18 Item information in record'''
:One character code that indicates whether item information is in the record, contained in one or more occurrences of fields [[hold/530|530]]-[[hold/532|532]].
:'''0 ''' = No item information:'''1 ''' = Item information:'''x ''' = Not applicable
'''19 Undefined'''
'''20 Length of “Length of field”'''
: One decimal digit giving the number of characters in the “Length of field” part of each directory entry. The value in ''UNIMARC holdings format'' is '''4'''.
'''21 Length of “Starting character position“'''
:One decimal digit giving the number of characters in the “Starting character position“ of each directory entry. The value in ''UNIMARC holdings format'' is '''5'''.
'''22 Length of implementation-defined portion'''
:A decimal digit giving the number of characters in the implementation-defined portion of each directory entry. As a UNIMARC directory entry does not contain such a portion, the value in UNIMARC is '''0'''.
'''23 Undefined (blank).'''