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  1. DSpace
  2. DS-1348

Item level versioning breaks persistence and lacks meta information

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    • Documentation Status:
      Needed

      Description

      At the moment the item level versioning breaks the concept of persistent identifiers as an item gets a new handle assigned during versioning, e.g.

      Create an item
      -> it gets baseHandle/n

      Version this item
      -> the new version gets baseHandle/n
      -> the original version gets baseHandle/n.1

      Version it again
      -> the new version gets baseHandle/n
      -> the second version gets baseHandle/n.2
      -> the original version gets baseHandle/n.1
      and so on

      With regards to relationship services and versioning (here is some information about persistent identifier and value added services http://www.ands.org.au/guides/persistent-identifiers-expert.html#_sec331) relationship services can provide identifiers which encompass all versions of an item. So it should be something like that

      Create an item
      -> the encompassing identifier baseHandle/n is created
      -> the item gets an identifier baseHandle/n.1
      -> the baseHandle/n encompasses baseHandle/n.1 and identifies it as the newest and only version
      Create a new version
      -> the new version gets identifier baseHandle/n.2
      -> the baseHandle/n encompasses baseHandle/n.1 and baseHandle/n.2 and points to baseHandle/n.2 as the newest version

      One other can of worms is how to handle the base identifier which encompasses all the versions. It's like a container for items and not an item itself.

      Metadata:
      a) items not connected via metadata
      The versioned items are not linked via metadata elements like hasVersion, isVersionOf, replaces, isReplacedBy. So e.g. harvesting a versioned item via OAI-PMH gives no clue, that it is versioned at all.

      b) dc.date.issued does not change
      Each version of an item got the same dc.date.issued

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              Assignee:
              pbecker Pascal-Nicolas Becker
              Reporter:
              cjuergen Claudia J├╝rgen
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