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There is an inconsistency in the copy action: Given the following control sample: 245 _aThe art of computer programming _cDonald E. Knuth. 300 _aA_exists _bB_exists If we apply action (a) Copy the whole field 245 to 300, we get: 245 _aThe art of computer programming _cDonald E. Knuth. 300 _aA_exists _bB_exists 300 _aThe art of computer programming _cDonald E. Knuth. If we apply action (b) Copy the subfield 245$a to 300$a, we get: 245 _aThe art of computer programming _cDonald E. Knuth. 300 _aThe art of computer programming _bB_exists In (a) the field is copied but in (b) the subfield is erased. We should be consistent and don't erase the destination field. Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com> Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl> Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
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