Chapter 5. Permutations Pattern
Intent
The Permutations pattern is used by the server to separate the resource (URL) from the representation (for example, HTML or XML). Separating the resource from the representation makes it possible for an end user to focus on the resource and not have to worry about the content associated with the URL. For example, if a client's bank account is at the URL http://mydomain.com/accounts/user, the same URL can be used regardless of device (phone, PC, and so on).
Motivation
In the early days of the Web, there were applications called price comparison services. Price comparison services compared prices between multiple online vendors. The price comparison services were made possible by using screen-scraping technologies. ...
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