<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31347074</termId><termName>stacks</termName><termType>PT</termType><termNote><![CDATA[ Vertical mains of a system of soil, waste, or vent piping extending through one or more stories. ]]></termNote><termCreatedDate>2026-03-30 20:33:38</termCreatedDate><relation><relationType>UF</relationType><termId>31347075</termId><termName>stack</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31322040</termId><termName>piping</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31377223</termId><termName>soil stacks</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31377228</termId><termName>vent stacks</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31377234</termId><termName>waste stacks</termName><termType>PT</termType></relation></term>  </Zthes>