How do I have to interpret the exported calibration XML files?

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When you export the calibration of a ray file or a rays sequence, you obtain an XML-file which allows you to calculate where the microlenses appear on the raw image. This manual explains how to use the XML-file data:

Where do I find the documentation for the Light Field SDK 3.0?

The latest version of the Light Field SDK 3.0 documentation can be found online under this link:

http://www.raytrix.de/Rx.ApiLF.3.0/