<?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">tropers</topic></authority><related type="broader"><topic>liturgical texts</topic></related><variant type="other"><topic>troper</topic></variant> <note xml:lang="en"><![CDATA[ Books of tropes, which are introductions to liturgical chants or interpolations or elaborations to the text of the Catholic Mass. They were discontinued when the Roman Missal was revised under Pius V (1566-1572). ]]></note></mads>