<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">hot walls</topic></authority><related type="broader"><topic>walls by function</topic></related><variant type="other"><topic>flue walls</topic></variant><variant type="other"><topic>hot wall</topic></variant><variant type="other"><topic>walls, hot</topic></variant> <note xml:lang="en"><![CDATA[ Garden walls provided with heating channels, or flues, which create an artificial microclimate for assisting in the growth or ripening of fruit tress or shrubs trained against the walls; popular in the 18th and 19th centuries. ]]></note></mads>