<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31349321</termId><termName>keywork</termName><termType>PT</termType><termNote><![CDATA[ Use to denote collectively the various mechanical contrivances devised to supplement the fingers in controlling the fingerholes of aerophones. ]]></termNote><termCreatedDate>2026-03-30 20:34:16</termCreatedDate><relation><relationType>UF</relationType><termId>31349322</termId><termName>key systems</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31349323</termId><termName>systems, key</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31323157</termId><termName>aerophone components</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31379380</termId><termName>Albert system</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31379384</termId><termName>Boehm system</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31379389</termId><termName>closed system</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31379391</termId><termName>open system</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31379395</termId><termName>simple system</termName><termType>PT</termType></relation></term>  </Zthes>