code: public Verifier newVerifier(InputStream stream, String systemId )
  		throws VerifierConfigurationException, SAXException, IOException {
  		
  		return compileSchema(stream,systemId).newVerifier();
  	}
docs: parses a schema from the specified InputStream and returns a Verifier object
  that validates documents by using that schema.
  
  @param	systemId
  System ID of this stream.