<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344593</termId><termName>calcium oxalate</termName><termType>PT</termType><termNote><![CDATA[ A salt of oxalic acid, calcium oxalate can form naturally on calcareous stones as a reaction to oxalic acid excretions of mosses and lichens. In a conservation context, calcium oxalate is generally considered in its role as a form of bioterioration but its cultivation as a protective film for limestone surfaces has been investigated as well. ]]></termNote><termCreatedDate>2026-03-30 20:32:56</termCreatedDate><relation><relationType>UF</relationType><termId>31344594</termId><termName>calcium oxalates</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344595</termId><termName>oxalate, calcium</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31375392</termId><termName>whewellite</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31344676</termId><termName>weddellite</termName><termType>PT</termType></relation></term>  </Zthes>