ARRI ALEXA SUP 7.0, Pocket Manual, Page: 40 / 100

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Metadata Overview
Metadata is a set of data that describes and gives
information about other data. ALEXA always records
as much metadata as is available. This additional
information makes documentation easier as the
metadata is stored within the image files so it cannot
get lost.
A range of automatic and human-readable data is
being delivered by the ALEXA camera, that makes
work in post much easier: exposure index, gamma
and white balance information, for example, is
essential for creating dailies or color grading.
Reel number, project fps, date and time become
important when combining images and sound from
different sources. Frame by frame lens metadata, as
recorded by ALEXA Plus, ALEXA M or ALEXA Stu-
dio, when used with an LDS lens or a non-LDS lens
in combination with the Lens Data Mount or Lens
Data Archive, is very useful for VFX work.
The Metadata fields listed here are a selection from
a larger set of metadata that is stored along with
the movie clips on the SxS PRO card. Metadata in
the ALEXA appears in several different ways: Final
Cut Pro 7 XML file, Avid Log Exchange (ALE) file,
QuickTime metadata atom, MXF metadata XML and
the ARRI Digital MetaData (ADMD) atom.
Theses atoms or text based files can be parsed by
e.g. editing software and offer the accompanying
information mentioned above to the application and
its user.