The om.XmlReader class provides methods to read and process a file written in
        XML format, following the
        SAX standards.
    Steps to use a XML reader:
        - Declare a variable with the om.XmlReader type.
 
        - Create the reader object with the createFileReader() method and assign the reference to the
          variable.
 
        - Process SAX events in a WHILE loop, by reading document fragments with
          the read()
          method.
 
        - Inside the loop, according to the SAX event, process element attributes with getAttributes() or get the element
          data with the getCharacters()
          methods.