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==172 CODED DATA FIELDCoded data field: INFORMATION SERVICE POLICYInformation service policy==
This field contains coded data applicable to all types of holdings records, that indicates the general
of its physical units specified in the holdings record.
==Occurrence==
Mandatory. Not repeatable.
==Indicators==
Indicator 1: blank (not defined)
Indicator 2: blank (not defined)
==Subfields==
==$a Coded data. ==
Not repeatable.
==Notes on Field Contents==
'''$a/0'''
#
= Unknown
'''$a/1 Lending policy'''
# = Information not available
u = Unknown
'''$a/2 Reproduction policy'''
# = Information not available
u = Unknown
==Related Field==
371NOTES ON INFORMATION SERVICES POLICYNotes on information services policy
==Examples==
''EX 1''
172 '''<nowiki>##$aaaa</nowiki>'''
Item available for consultation ($a/0 = a), lending ($a/1 = a) and reproduction ($a/2 = a)
''EX 2''
172'''<nowiki>##$aabb</nowiki>'''
Item available only for consultation ($a/0 = a), neither lending ($a/1 = b) nor reproduction