Exactly. Also you may want to hide the duplicates.

Am 18. November 2015 13:56:19 MEZ, schrieb Patrick Shanahan 
<p...@wahoo.no-ip.org>:
>* Christian Mandel <c.man...@gmx.net> [11-18-15 03:58]:
>> is it possible to write crop metadata (see 
>>
>http://photo.stackexchange.com/questions/43893/how-to-store-tilt-rotation-and-crop-information-in-metadata,
>
>> xmp parameters for crop values) instead of actually performing the
>crop? 
>> I guess it is not a standard feature (at least I did not find it) but
>
>> maybe it is possible with lua?
>> 
>> The background: I do a lot of design work with photographs from dt 
>> (calendars, photo books, etc.). Therefore, the photographs have to
>fit 
>> within given frames. When I crop in dt (e.g. in 2:3 format) and use
>it 
>> in a 4:5 template, I have to crop again, which is often not possible
>due 
>> to losing important image parts. For these situations it would be
>better 
>> to be able to "add" some picture at the other edges. Therefore, I
>have 
>> to go back into darktable, crop different, export again and reuse the
>
>> image, which is cumbersome.
>
>Make yourself a "master" image, everything but the crop.  Duplicate the
>"master" image and crop and export the dup.  Now you have two copies of
>the same image in your database/library but only one "master" and an
>exported/cropped jpg and two xmp files, one for each.  The dup of your
>master is only an entry in your library and an xmp file.  
>
>Every time you need another, different crop, go back to the master and
>make another dup (a library entry and an xmp) and export it at the
>different crop.  You may even be able to configure export to
>automagically
>assign a number or letter designation representing the image's crop
>ratio.
>
>-- 
>(paka)Patrick Shanahan       Plainfield, Indiana, USA         
>@ptilopteri
>http://en.opensuse.org    openSUSE Community Member   
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>http://wahoo.no-ip.org/gallery2
>Registered Linux User #207535                    @
>http://linuxcounter.net
>
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