<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31440343</termId><termName>tiercerons</termName><termType>PT</termType><termNote><![CDATA[ Secondary ribs springing from the main springer or central boss of vaults and leading to the ridge ribs. ]]></termNote><termCreatedDate>2026-03-30 20:58:41</termCreatedDate><relation><relationType>UF</relationType><termId>31440344</termId><termName>intermediate ribs</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440345</termId><termName>ribs, intermediate</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440346</termId><termName>ribs, secondary</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440347</termId><termName>secondary ribs</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440348</termId><termName>tierceron</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440349</termId><termName>tiercerones</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31414813</termId><termName>ribs</termName><termType>PT</termType></relation></term>  </Zthes>