XML, of course, is an opposite: It is a rather good way for humans to create data meant for computer consumption. Once the data are laid out, they can be transf

XML, of course, is an opposite: It is a rather good way for humans to create data meant for computer consumption. Once the data are laid out, they can be transformed into a more efficient machine form in the same way a program is compiled, but for the web this is rarely done for any format, including pure machine-to-machine interaction. E.g. JSON is mostly used for machine-to-machine exchange and it is far from begin efficient for this.