[Moims-dai] Question about Reversible Transformation

John Garrett garrett at his.com
Sun Nov 20 07:14:57 UTC 2016



I think the explanation of Reversible Transformation with examples later in
the document is helpful in understanding what is meant.


It might help to replace 'entity' with 'component' or 'item' or 'thing' or


For version 3 that we are working on now.  I think I might drop the second
'resulting' and 'base' in an updated definition.  Would that change anyone's
understanding the term?


Wishing you prosperity and peace,



From: MOIMS-DAI [mailto:moims-dai-bounces at mailman.ccsds.org] On Behalf Of
Caillet Claire
Sent: Thursday, November 17, 2016 4:17 AM
To: MOIMS-Data Archive Ingestion <moims-dai at mailman.ccsds.org>
Subject: [Moims-dai] Question about Reversible Transformation


Dear all,


Once again, in the translation work of the OAIS, we have some questions. It
is about the definition of the Reversible Transformation (A Transformation
in which the new representation defines a set (or a subset) of resulting
entities that are equivalent to the resulting entities defined by the
original representation.  This means that there is a one-to-one mapping back
to the original representation and its set of base entities.).


What is meant by "resulting entities" and "base entities" ? Is the
one-to-one mapping between the original representation and its base entities
or between the new and the original representation base entities ?


Thanks for you help.


Claire Caillet




Centre Spatial de Toulouse

Tel.: +33 5 61 28 14 38

e-mail : claire.caillet at cnes.fr <mailto:claire.caillet at cnes.fr> 


18 Avenue Edouard Belin 

31 401 Toulouse Cedex 4




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