<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31426098</termId><termName>fixed-wing aircraft</termName><termType>PT</termType><termNote><![CDATA[ Aircraft that derive lift from the motion of air over aerodynamically designed surfaces that are rigidly and permanently attached to the fuselage. ]]></termNote><termCreatedDate>2026-03-30 20:54:58</termCreatedDate><relation><relationType>UF</relationType><termId>31426099</termId><termName>aircraft, fixed wing</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31426100</termId><termName>aircraft, fixed-wing</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31426101</termId><termName>fixed wing aircraft</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31395712</termId><termName>heavier than air aircraft</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449657</termId><termName>gliders</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449659</termId><termName>airplanes</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31325104</termId><termName>seaplanes</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449664</termId><termName>canards</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31395764</termId><termName>ultralight aircraft</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449670</termId><termName>[fixed-wing aircraft by number of wings]</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31449671</termId><termName>[fixed-wing aircraft by wing design]</termName><termType>PT</termType></relation></term>  </Zthes>