<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31328411</termId><termName>twenty-first century</termName><termType>PT</termType><termNote><![CDATA[ Century in the proleptic Gregorian calendar including the years 2000 to 2099 (or 2001 to 2100). ]]></termNote><termCreatedDate>2026-03-30 20:28:32</termCreatedDate><relation><relationType>UF</relationType><termId>31328412</termId><termName>21st century</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31328413</termId><termName>21st-century</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31328414</termId><termName>century, twenty-first</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31309694</termId><termName>dates by century or millennium</termName><termType>PT</termType></relation></term>  </Zthes>