Change Format of Parameter, Change Format of Return
Value These two patterns mean the type of a parameter or a
return value does not change, but the format of them changes.
For example, in Google Calendar API, a method accepts a
string type parameter that needs to be encoded using URLEncode
in the version 2.0. But in version 3.0, developers
need only pass a string type parameter without encoding.
These patterns are discovered in four APIs except Twitter
API. In most cases, the goal of the changes is to facilitate the
development of new client applications