Abiquo is committed to maintaing maintaining backwards compatibility for 2 minor releases. If for some reason, backwards compatibility were not possible to maintain, Abiquo would detail the changes in the API Changelog. For example, Abiquo 5.4 should be compatible with 5.3 and 5.2. The best practice to ensure compatibility is to use the version number in the header of your API request with the media type and content type.
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