<?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">photodegradation</topic></authority><related type="broader"><topic>degradation</topic></related><related type="broader"><topic>physicochemical processes</topic></related><variant type="other"><topic>photo-ageing</topic></variant><variant type="other"><topic>photo-aging</topic></variant><variant type="other"><topic>photoageing</topic></variant><variant type="other"><topic>photoaging</topic></variant> <note xml:lang="en"><![CDATA[ Degradation of a material caused by exposure to light, specifically the chemical changes to photodegradable molecules induced by absorption of photons, especially those wavelengths found in sunlight. The process by which a material is damaged due to prolonged exposure to ultraviolet radiation. ]]></note></mads>