ignore xs:float (and other types) representation differences when comparing XML files

I am using XMLUnit for my JUnit tests and I would like to configure it so as to ignore differences related to alternative (but equivalent) rendering of certain types. E.g. 3.14 vs 3.140 for xs:float fields. I guess a full solution would require the tests to be XSD-aware so that the type of each field is known and nuanced comparisons be made in all cases (e.g. true/1 for xs:boolean and perhaps even going so far as to account for default attribute values). At any rate, I am willing to accept workarounds so that I can get my tests running without all those false alarms.

An SSCCE (without the JUnit machinery for easier reproduction) is given below:

import org.custommonkey.xmlunit.XMLTestCase;
import org.custommonkey.xmlunit.XMLUnit;
import org.custommonkey.xmlunit.Diff;


class XMLTestCaseConcrete extends XMLTestCase {
}


public class FooMain {

    public static void main(String args[]) throws Exception {
        String s1 = "<a>180</a>";
        String s2 = "<a>180.0</a>";
        Diff diff = XMLUnit.compareXML(s1, s2);
        System.out.printf("difference below:\n---------\n%s\n-------------\n", diff);
        XMLTestCase xmlTest = new XMLTestCaseConcrete();
        xmlTest.assertXMLEqual(s1, s2);
    }    
}