<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>5563</termId><termName>PETROLEO SINTETICO</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>PETROLEO SINTETICO</termSortkey><termCreatedDate>PETROLEO SINTETICO</termCreatedDate><termModifiedDate>2015-02-09 05:58:16</termModifiedDate><relation><relationType>UF</relationType><termId>50438</termId><termName>Gasolina sintética</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>5555</termId><termName>PETROLEO</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>3527</termId><termName>HIDROCARBUROS</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>7851</termId><termName>LICUEFACCION DEL CARBON</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>7849</termId><termName>PROCESOS DE FISCHER-TROPSCH</termName><termType>PT</termType></relation></term>  </Zthes>