28     std::list<std::string> attributes;  in main()  local
30     attributes.push_back("TopLeftColor");  in main()
31     attributes.push_back("TopRightColor");  in main()
32     attributes.push_back("BottomLeftColor");  in main()
33     attributes.push_back("BottomRightColor");  in main()
34     attributes.push_back("filter:brightness:mean");  in main()
35     attributes.push_back("filter:brightness:standard-deviation");  in main()
36     attributes.push_back("filter:brightness:kurtosis");  in main()
37     attributes.push_back("filter:brightness:skewness");  in main()
38     attributes.push_back("filter:saturation:mean");  in main()
39     attributes.push_back("filter:saturation:standard-deviation");  in main()
40     attributes.push_back("filter:saturation:kurtosis");  in main()
41     attributes.push_back("filter:saturation:skewness");  in main()
54           list<std::string>::iterator pos = attributes.begin();  in main()
55           while(pos != attributes.end())  in main()