<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31319849</termId><termName>water softener</termName><termType>PT</termType><termNote><![CDATA[ Chemical compound used for converting soluble scale-forming solids in water into insoluble form. ]]></termNote><termCreatedDate>2026-03-30 20:26:12</termCreatedDate><relation><relationType>UF</relationType><termId>31319850</termId><termName>softener, water</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31305843</termId><termName>additive</termName><termType>PT</termType></relation></term>  </Zthes>