<?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">collector assigned numbers</topic></authority><related type="broader"><topic>identification numbers</topic></related><variant type="other"><topic>collector assigned number</topic></variant><variant type="other"><topic>collector&apos;s number</topic></variant> <note xml:lang="en"><![CDATA[ Identification numbers associated with objects or documents that are assigned by an individual collector, rather than a numerical system applied by a repository. These numbers may appear on the backs of paintings, and occasionally appear in stock books along with other descriptions of an object.  These are similar to collector’s marks but without a stamp, and may be numeric or alphanumeric.  ]]></note></mads>