<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31320431</termId><termName>self-cleaning materials</termName><termType>PT</termType><termNote><![CDATA[ Smart materials that have the capacity to clean themselves. Examples are silicone-based architectural coatings. ]]></termNote><termCreatedDate>2026-03-30 20:26:21</termCreatedDate><relation><relationType>UF</relationType><termId>31320432</termId><termName>materials, self-cleaning</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31320433</termId><termName>self-cleaning material</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31306114</termId><termName>smart materials</termName><termType>PT</termType></relation></term>  </Zthes>