X10 Subfield $b - Subordinate unit:

Subfield $b contains a name of a subordinate corporate unit, a name of a city section, or a name of a meeting entered under a corporate or a jurisdiction name.

Examples:

110 1#$aUnited States.$bCongress.$bJoint Committee on the Library.

110 2#$aAmerican Veterinary Medical Association.$bMeeting.

110 2#$aFreemasons.$bConcordia Lodge, No. 13 (Baltimore, Md.)

110 1#$aParis.$bMontmartre.

[Pre-AACR 2 formulated heading]