<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31341502</termId><termName>darkening</termName><termType>PT</termType><termNote><![CDATA[ To make or become dark in shade, value, or color; a form of discoloration: the blackening or browning of materials due to such causes as chemical process, exposure to light, the passage of  time. ]]></termNote><termCreatedDate>2026-03-30 20:32:05</termCreatedDate><relation><relationType>UF</relationType><termId>31341503</termId><termName>blackening</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31341504</termId><termName>browning</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31341505</termId><termName>darkened</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31317737</termId><termName>discoloration</termName><termType>PT</termType></relation></term>  </Zthes>