erp/core/CoreApp/models/Model_is.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 
class Model_is extends Lin_Model 
{
	function __construct(){
	parent::__construct();
	$this->load->database();
	$this->table = 'is';
    $this->load_table('is');
}
}  //end class