<?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">hard soap</topic></authority><related type="narrower"><topic>Castile soap</topic></related><related type="other"><topic>soft soap</topic></related><related type="broader"><topic>soap</topic></related><variant type="other"><topic>hard soaps</topic></variant><variant type="other"><topic>soap, hard</topic></variant><variant type="other"><topic>soda soap</topic></variant> <note xml:lang="en"><![CDATA[ A principal class of soap that is created using fatty acids that are longer and tend to dissolve more slowly in water than soft soaps; for example, olive oil and caustic soda lye would be used to create a hard soap. ]]></note></mads>