Ivan Masár created DS-1523:
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Summary: detection of duplicate items during import and submission
Key: DS-1523
URL: https://jira.duraspace.org/browse/DS-1523
Project: DSpace
Issue Type: New Feature
Reporter: Ivan Masár
Users expressed the need for DSpace to detect whether an item they're about to
import/submit already exists in the repository. This issue is trying to capture
the requirements for this feature.
The major point here is the definition of a duplicity. Some uses already have a
strict definition of a duplicity, e.g. an equal value of a metadata field
(dc.identifier.uuid). Others may depend on similarity of multiple metadata
fields (e.g. dc.title, dc.issn) which may be expressed by Levenshtein distance
while the rest may even be different (e.g. different values in
dc.contributor.autor).
This leads me to the conclusion that we need to provide a way for users to
define their own method of comparison by means of a plugin. The disadvantage of
this approach is that checking each imported item against all existing items
using an user-defined (possibly non-optimally fast) method may slow down import
and therefore the feature needs to be opt-in. Of course we should provide
implementations for some commonly used cases, like those mentioned above. The
input to the comparison method should be the item DSO (so that its metadata and
bitstreams can be read) with the parent object filled in so that the search can
be restricted to a community/collection in order to make it possible to reduce
the search scope.
Here are some recent discussion on this topic:
*
http://dspace.2283337.n4.nabble.com/KE1019161-Import-Editing-Items-in-DSpace-and-evaluating-the-existence-with-an-other-value-then-the-iD-td4662400.html
* DS-1515
*
http://dspace.2283337.n4.nabble.com/how-to-filter-the-repeat-items-with-import-tools-td4662729.html
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