code: public Schema compileSchema( String url )
  		throws VerifierConfigurationException, SAXException, IOException {
  		
  		return compileSchema( new InputSource(url) );
  	}
docs: processes a schema into a Schema object, which is a compiled representation
  of a schema.
  
  The obtained schema object can then be used concurrently across multiple
  threads.
  
  <p>
  Some of XML parsers accepts filenames as well as URLs, while others
  reject them. Therefore, to parse a file as a schema, you should use
  a File object.
  
  @param	url
  A source url of a schema file to be compiled.