The Web Tier

The Web Tier hosts all “public” web sites and web services that can be connected to the eReader.

First some eReaders have an internet browser which allows to connect and browse nearly any website (let's ignore the Flash on iPad battle). This allows Web Applications to be used by any eReader. There is clearly a place for SaaS (Software as a Service) residing in some Cloud here. For example you can use your Gmail or Yahoo! Mail without any prior setup of the device.

Second, eReaders can be connected to “web services”. In that case, the device doesn't rely directly on a web browser. Rather an application calls Web Services and presents the results in an optimized way. For example the Kindle connects to the Kindle Store. On tablets, Twitter Clients are a good example of eReading applications calling Web Services – The Twitter API.

Of course, using the web tier requires an Internet Connection. In the model, the Internet connection is represented by the “Network” and “Communication Path” notations.

Jean-Francois Declercq,
Aug 9, 2011, 6:27 AM