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https://jira.duraspace.org/browse/DSCR-23?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=20480#action_20480
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Mark Diggory commented on DSCR-23:
----------------------------------

The challenge is that the ISO standard for the value of those DSpace Dublin 
Core metadata fields does not support the syntax you describe, So storing your 
dates in that form is slightly inappropriate.  The current approach does 
breakup existing dates to extract the year from them. 
http://www.w3.org/TR/NOTE-datetime  I understand the need/want to have date 
ranges to express the uncertainty around a date, but I suggest that we look at 
extending DSpace to support something like dc.coverage.temporal where using a 
encoded Dublin Core Period scheme would capture all the detail around such a 
date range:

http://dublincore.org/documents/dcmi-period/
http://dublincore.org/documents/dcmi-terms/#terms-temporal

Then parsing such values would be more logical and the name provides a detail 
where the range could be expressed as "uncertain creation date".


> Dates with question marks
> -------------------------
>
>                 Key: DSCR-23
>                 URL: https://jira.duraspace.org/browse/DSCR-23
>             Project: DSpace Discovery Module
>          Issue Type: Improvement
>            Reporter: Jennifer Whalan
>         Attachments: SolrServiceImpl.patch
>
>
> For circa dates, question marks are used. Eg: c.1978 -> 1978?  or c.1970s -> 
> 197?
> Currently discovery handles the 1978? dates fine, but treats 197? as 197. 
> This patch either removes the question mark if the year has four digits 
> (1978?), and replaces the question marks with '0' if there are less then 4 
> digits (197?).

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