field contains a code for the subject category, or facet, that is
associated with the 1XX field in an
established heading record. The
code indicates the relative position of the heading in a particular
hierarchical arrangement in the thesaurus. The UNBIS Thesaurus is
organized into 18 broad subject categories,
each of which is further divided into sub-categories.
The six-digit code represents the subject category and sub-category to
which a thesaurus term has been assigned. Since a thesaurus term may be
classified within more that one category, field 072
is repeated for
each location of the heading in the thesaurus.
Required for thesaurus headings.
complete list of categories is posted on the Thesaurus
Note: This field is used only for
thesaurus headings, not for geographical name headings.
$a - Subject
category code (NR).
The code for the broad subject category to which the heading belongs in
a hierarchically-arranged thesaurus.
$2 - Code source
A MARC code that identifies the UNBIS Thesaurus, used to assign the subject
category code when the second indicator position contains value 7.
The code assigned to the UNBIS Thesaurus is:
_ 7 $a 14.02.02
|150 $a ACADEMIC FREEDOM
|072 _ 7 $a 05.02.00
| 072 _ 7 $a 14.05.02
|150 $a OCCUPATIONAL PSYCHOLOGY