<?xml version="1.0" encoding="UTF-8"?>
<foo:Object xsi:schemaLocation="http://foo.com/ http://foo.com/foo.xsd"
xmlns:ns0="http://lipsum.com/bar" xmlns:foo="http://foo.com/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <foo:Some attr1="601"/>
   <foo:Others>
      <bar:Another xsi:schemaLocation="http://lipsum.com/bar
      http://lipsum.com/bar.xsd" xmlns:bar="http://lipsum.com/bar">
         <bar:SomeOther attr2="01"/>
      </bar:Another>
  </foo:Others>
</foo:Object>

@XmlAnyElement(lax = true)
    @XmlElementRefs({
         @XmlElementRef(name="Another", type=Another.class, required=false)
    })
    protected List<Object> any;

1.- Ignore the namespaces from @XmlElementRef classes during the marshalling.
2.- Remove the not used namespaces aka NS[0-9] prefixes from the root element.