<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31426120</termId><termName>balloons</termName><termType>PT</termType><termNote><![CDATA[ Refers to  nonporous, flexible spherical or pear-shaped bags or envelope made of a lightweight material inflated with heated air or a gas that is lighter than air and designed to rise and float in the atmosphere, usually while carrying aloft passengers or scientific instruments. ]]></termNote><termCreatedDate>2026-03-30 20:54:58</termCreatedDate><relation><relationType>UF</relationType><termId>31426121</termId><termName>air balloon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31426122</termId><termName>balloon</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31395718</termId><termName>lighter than air aircraft</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449696</termId><termName>barrage balloons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449702</termId><termName>meteorological balloons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449709</termId><termName>sounding balloons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449712</termId><termName>hot-air balloons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31395780</termId><termName>captive balloons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31395782</termId><termName>free balloons</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31343050</termId><termName>ballooning</termName><termType>PT</termType></relation></term>  </Zthes>