<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31436617</termId><termName>stratigraphy</termName><termType>PT</termType><termNote><![CDATA[ Study of the origin, composition, distribution, and succession of strata or layers. ]]></termNote><termCreatedDate>2026-03-30 20:57:43</termCreatedDate><relation><relationType>BT</relationType><termId>31410605</termId><termName>geology</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31408069</termId><termName>stratigraphers</termName><termType>PT</termType></relation></term>  </Zthes>