xerces « Validation « Java XML Q&A

1. XercesImpl in conflict with JavaSE 6's internal xerces implementation. Both are needed... what can be done?    stackoverflow.com

I am sure that I am not the first to encounter this conflict. The code that I have inherited does the following:

org.w3c.dom.Document dom; // declaration
javax.xml.validation.Schema schema; // declaration

...
...
...

javax.xml.validation.Validator validator = schema.newValidator();
validator.validate(new DOMSource(dom));

2. How can I validate the XML document in a SAXParser without having to use an XMLReader?    stackoverflow.com

I want to create a SAXParser which validates, but it seems the only way is either to create an XMLReader and use setErrorHandler() or let the ContentHandler in SAXParser.parse() also implement ...