<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>8978</termId><termName>quantum theory</termName><termType>PT</termType><termCreatedDate>0000-00-00 00:00:00</termCreatedDate><relation><relationType>BT</relationType><termId>10598</termId><termName>quantum physics</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>11336</termId><termName>quantum field theory</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>10610</termId><termName>quantum statistics</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>10613</termId><termName>wave mechanics</termName><termType>PT</termType></relation></term>  </Zthes>