<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31426190</termId><termName>hang gliders</termName><termType>PT</termType><termNote><![CDATA[ Gliders in which the pilot controls altitude and glide path by shifting position in a suspended seat or harness; originally developed in the 1890s and, since the 1960s, ultralight aircraft with flexible wing surfaces. ]]></termNote><termCreatedDate>2026-03-30 20:54:59</termCreatedDate><relation><relationType>UF</relationType><termId>31426191</termId><termName>hang glider</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31426192</termId><termName>hang-glider</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31426193</termId><termName>gliders, hang</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31449657</termId><termName>gliders</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31395764</termId><termName>ultralight aircraft</termName><termType>PT</termType></relation></term>  </Zthes>