<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31410649</termId><termName>photonics</termName><termType>PT</termType><termNote><![CDATA[ A branch of physics that deals with the properties and applications of photons especially as a medium for transmitting information.  ]]></termNote><termCreatedDate>2026-03-30 20:50:25</termCreatedDate><relation><relationType>BT</relationType><termId>31372743</termId><termName>physics</termName><termType>PT</termType></relation></term>  </Zthes>