<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31452999</termId><termName>polarized light</termName><termType>PT</termType><termNote><![CDATA[ Light waves made to vibrate in a single plane. ]]></termNote><termCreatedDate>2026-03-30 21:01:58</termCreatedDate><relation><relationType>BT</relationType><termId>31432049</termId><termName>light</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31402837</termId><termName>polarization</termName><termType>PT</termType></relation></term>  </Zthes>