'Required:
field_name -- the first word in the string
name --the changed name according to the dictionary
line -- the string to be parse
Returns:
list of None, None, and part of a tag
Logic:'

def __num_format_func(self, field_name, name, line):

    the_string = name
    num_format = self.__parse_num_format(line)
    if num_format:
        the_string += ('<number-format>%s' % num_format)
    return [None, None, the_string]
