code: ValidationDriver createDriver(PropertyMap configProps) {
          SchemaReaderLoader loader = new SchemaReaderLoader();
          SchemaReader schReader = loader.createSchemaReader(SCHEMATRON_NS_URI);
          ValidationDriver validator = new ValidationDriver(configProps,
                  schReader);
          return validator;
      }
docs: Creates and initializes a ValidationDriver to perform Schematron
  validation. A schema must be loaded before an instance can be validated.
  
  @param configProps
  A PropertyMap containing properties to configure schema
  construction and validation behavior; it typically includes
  {@code SchematronProperty} and {@code ValidationProperty}
  items.
  @return A ValidationDriver that is ready to load a Schematron schema.