<commit_before><?php

namespace Amazon {
    
    final class Amazon {
        
        /**
         * Amazon Product Advertising API version
         */
        const VERSION = '2011-08-01';
        
        /**
         *
         * Store Amazon object class
         * @staticvar null|object
         */
        static private $_obj = null;
        
        /**
         *
         * AWS key
         * @var string 
         */
        private $_aws_key;
        
        /**
         *
         * AWS Secret Key
         * @var string
         */
        private $_secret_key;
        
        /**
         * Associate ID
         * @var string
         */
        private $_tag_key;        
        
        /**
         *<commit_msg>version lib+amazon<commit_after><?php

namespace Amazon {
    
    final class Amazon {
        
        /**
         * Amazon Product Advertising API version
         */
        const VERSION_AMAZON = '2011-08-01';
        
        /**
         * Library version 
         */
        const VERSION_LIB = '1.0';
        
        /**
         *
         * Store Amazon object class
         * @staticvar null|object
         */
        static private $_obj = null;
        
        /**
         *
         * AWS key
         * @var string 
         */
        private $_aws_key;
        
        /**
         *
         * AWS Secret Key
         * @var string
         */
        private $_secret_key;
        
        /**
         * Associate ID
         * @var string
         */
        private $_tag_key;        
        
        /**
         *
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