API Versioning
The Sway Charts REST API attempts to maintain backward compatibility with the clients provided the following:
Clients ignore the data they do not understand
Clients only use the data they need
For example, in case of XML representation, clients must make sure they do not couple their logic with current XML representation in such a way that adding new fields causes their application to malfunction. This allows adding new data to resources without breaking clients.
If any data is removed or data meaning is changed, a new notification API version is introduced. Switch between different versions is based on the URI of the API (e.g. http://host/api/v1 for version 1 and http://host/api/v2 for version 2).
API versioning supports only major integer versions such as 1,2,3 etc. With the API, there is no notion of minor releases.
Addition of a new data field to data representation
Changing the logical meaning of a field
Removing a field
Changing the default representation, currency units etc.
Addition of new independent requests
New business rules and/or application flow
New default values for optional request parameters or fields
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