<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31484540</termId><termName>heliographs</termName><termType>PT</termType><termNote><![CDATA[ Photographs made by dissolving light-sensitive bitumen in oil of lavender and applying a thin coating over a polished metal plate, or other substrate. The process was invented ca.1822 by Joseph Nicéphore Niépce, and is considered the first process to produce a permanent photographic image from a camera projection. ]]></termNote><termCreatedDate>2026-03-30 21:01:54</termCreatedDate><relation><relationType>UF</relationType><termId>31484541</termId><termName>heliograph</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31431564</termId><termName>direct positives</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31371198</termId><termName>heliography</termName><termType>PT</termType></relation></term>  </Zthes>