<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31411565</termId><termName>lean mortar</termName><termType>PT</termType><termNote><![CDATA[ In masonry, a mortar that lacks cementious materials and may be weak, harsh, or difficult to spread. ]]></termNote><termCreatedDate>2026-03-30 20:50:40</termCreatedDate><relation><relationType>UF</relationType><termId>31411568</termId><termName>poor mortar</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31411566</termId><termName>mortar, lean</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31411567</termId><termName>mortar, poor</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31374338</termId><termName>lime mortar</termName><termType>PT</termType></relation></term>  </Zthes>