<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31352001</termId><termName>undersea ridges</termName><termType>PT</termType><termNote><![CDATA[ Long narrow elevations with steep sides, located on the sea floor. ]]></termNote><termCreatedDate>2026-03-30 20:35:00</termCreatedDate><relation><relationType>UF</relationType><termId>31352002</termId><termName>ridges, undersea</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31352003</termId><termName>submarine ridges</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31352004</termId><termName>undersea ridge</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31324173</termId><termName>undersea landforms</termName><termType>PT</termType></relation></term>  </Zthes>