Questo articolo e' di qualche mese fa' ma presenta un ottima overview su questo argomento. Because real people interact with these applications, information must be presented in a visually appealing way.
Users fill out HTML forms and then receive static or dynamic HTML output in response.
For example, metacatalogs automatically query hundreds of existing online catalogs from a single user interface where users have made queries. In fact, it is likely that the network transmission of such automation will eventually dwarf the traffic generated from human-based interactivity. While a nice visual interface is an asset when it comes to enabling humans to interact with machines, it is an unnecessary obstacle when machines communicate with each other. What B2B really needs is an easy way to integrate the back-end systems of participating organizations. And we're not just talking about a solution that involves each business maintaining multiple interfaces to that data.