<?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">Boehm system</topic></authority><related type="other"><topic>flutes</topic></related><related type="other"><topic>clarinets</topic></related><related type="broader"><topic>keywork</topic></related><variant type="other"><topic>Boehm keywork</topic></variant><variant type="other"><topic>Boehm-system</topic></variant><variant type="other"><topic>keywork, Boehm</topic></variant><variant type="other"><topic>system, Boehm</topic></variant> <note xml:lang="en"><![CDATA[ Keywork for the flute developed by Theobald Boehm in the 1830s, involving an improved placement of fingerholes and a key mechanism to provide full venting and bring all fingerholes within easy control of the fingers. Other instrument makers later adapted the system for the clarinet, oboe, bassoon, and other aerophones. ]]></note></mads>