<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>21792</termId><termName>QUELATOS</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>QUELATOS</termSortkey><termCreatedDate>QUELATOS</termCreatedDate><termModifiedDate>2015-02-05 11:31:51</termModifiedDate><relation><relationType>UF</relationType><termId>46429</termId><termName>Aditivos</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>6702</termId><termName>COMPUESTOS DE COORDINACION</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>21757</termId><termName>EDTA</termName><termType>PT</termType></relation></term>  </Zthes>