<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">master-keyed locks</topic></authority><related type="narrower"><topic>duplex locks</topic></related><related type="narrower"><topic>hotel locks</topic></related><related type="broader"><topic>locks by form</topic></related><variant type="other"><topic>locks, master-keyed</topic></variant><variant type="other"><topic>master-keyed lock</topic></variant> <note xml:lang="en"><![CDATA[ Locking systems intended for use in a series, each lock of which may be actuated by two different keys, one capable of operating every lock of the series, and the other capable of operating only one or a few of the locks. ]]></note></mads>