The problem is that beans_1_1.xsd and beans_2_0.xsd share the same namespace and so we get:

java.lang.IllegalArgumentException: When using an array of Objects as the value of the 'http://java.sun.com/xml/jaxp/properties/schemaSource' property, it is illegal to have two schemas that share the same target namespace.

We would have to parse the xml twice. First to detect the version and then validate (with the correct XSD) and construct BeansXml object.