<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31472709</termId><termName>block walls</termName><termType>PT</termType><termNote><![CDATA[ Walls made of concrete masonry units. ]]></termNote><termCreatedDate>2026-03-30 21:07:13</termCreatedDate><relation><relationType>UF</relationType><termId>31472710</termId><termName>block wall</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31472711</termId><termName>walls, block</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31458748</termId><termName>walls by form</termName><termType>PT</termType></relation></term>  </Zthes>