Hello Devina,
 
there are several DOI registration agencies and as far as I know they all have 
their individual rules. It might be worth asking the registrations agency you 
want to use.
 
I personally would never use the same DOI for different versions. Let me give 
you an example to explain why. Alice cites DOI:10.5072/123, p. 25 and Bob wants 
to look up what Alice is referring to. If several versions are identified by 
the same DOI Bob would have to look up all versions on page 25 to hopefully 
find what Alice wanted to cite, as different versions normally differ at least 
in layout and page numbering if not even in their content. Beside the problem 
that the citation isn’t unambiguous, Bob will have problems to find all version 
identified by the DOI as the DOI resolver will send Bob to one of the versions 
only.
 
TLDR: In my personal opinion DOIs most important purpose is to make electronic 
publications citable. To do so, they have to be unambiguous, and must not be 
used for different versions.
 
Regards,
  Pascal

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> Am 15.08.2017 um 19:06 schrieb Devina Dandar <[email protected]>:
> 
> Hi everyone,
> 
> I am currently investigating whether it makes sense to assign different DOIs 
> for versions of the same item in our repository. 
> So for example, the pre-print has a DOI that’s different from the DOI of the 
> publisher’s version. Or every book chapter from the same book has its own 
> DOI. 
> 
> I’ve been doing some reading on best practices/combing the literature on this 
> topic, and was wondering if anyone has any experience with this? 
> In addition, do you have DOIs for every item in the repository, or a DOI 
> minting policy for the repository? And does your institution have a direct 
> relationship with the DOI registry?
> 
> If anyone is open to sharing their thoughts and expertise, I’d really 
> appreciate it! 
> 
> Thanks!
> Devina
> 
> Devina Dandar, MLIS, Librarian| Royal Roads University
> 
> T 250.391.2600 ext. 4324 | F 250.391.2594 | http://library.royalroads.ca
> 
> 2005 Sooke Road, Victoria, BC  Canada  V9B 5Y2 | royalroads.ca
> 
> 
> 
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> 
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