<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373565</termId><termName>polysiloxane</termName><termType>PT</termType><termNote><![CDATA[ Refers to all polymerized siloxanes, especially the silicones. ]]></termNote><termCreatedDate>2026-03-30 20:40:44</termCreatedDate><relation><relationType>UF</relationType><termId>31373566</termId><termName>polysiloxanes</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343245</termId><termName>siloxane</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31370804</termId><termName>polyvinyl siloxane</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31343751</termId><termName>methyl polysiloxane</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31410802</termId><termName>silicone oil</termName><termType>PT</termType></relation></term>  </Zthes>