<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31457240</termId><termName>billon</termName><termType>PT</termType><termNote><![CDATA[ An alloy of silver mixed with an equal or greater amount of a base metal, usually copper. Alloy of gold or silver with a majority admixture of base metal, often copper or tin. ]]></termNote><termCreatedDate>2026-03-30 21:03:04</termCreatedDate><relation><relationType>UF</relationType><termId>31457241</termId><termName>Bi</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31438457</termId><termName>silver alloy</termName><termType>PT</termType></relation></term>  </Zthes>