<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31456181</termId><termName>cobalt oxide</termName><termType>PT</termType><termNote><![CDATA[ An oxide of cobalt used chiefly in coloring glass and ceramics. ]]></termNote><termCreatedDate>2026-03-30 21:02:48</termCreatedDate><relation><relationType>UF</relationType><termId>31456182</termId><termName>oxide, cobalt</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31437332</termId><termName>cobalt blue</termName><termType>PT</termType></relation></term>  </Zthes>