<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31301312</termId><termName>opacity</termName><termType>PT</termType><termNote><![CDATA[ The quality or state of a substance or body of being impervious to rays of light. ]]></termNote><termCreatedDate>2026-03-30 20:20:57</termCreatedDate><relation><relationType>UF</relationType><termId>31301313</termId><termName>opaque</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31298110</termId><termName>optical properties</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31311691</termId><termName>covering power</termName><termType>PT</termType></relation></term>  </Zthes>