https://bugzilla.wikimedia.org/show_bug.cgi?id=16400

           Summary: Old property value not deleted
           Product: MediaWiki extensions
           Version: any
          Platform: All
               URL: http://gingerwiki.com/wiki/Property_Bug_Example
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: Semantic MediaWiki
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


There is a magic word REVISIONTIMESTAMP, which contains something like
20081120190615.
Now suppose I set the property Time Stamp to be the revision time stamp:
20081120190615.
then after editing and saving the page, I again click on the edit button
followed by Save page, this time without making any changes. Then I find that
the Time Stamp property contains two values, which should not be the case.
On the other hand, if during the last edit, a change was made, then (most of
the time) the property only contains a single value, as indeed it should.
In the exmple page ( http://gingerwiki.com/wiki/Property_Bug_Example ) the Time
Stamp property currently contains: 20081120190643, 20081120190615
This definitely seems like a bug to me.
The problem does not seem to be with the magic word REVISIONTIMESTAMP as I have
found it to be consistently single valued.
The problem seem to be with the current sematic property data-base.
In particular after an edit and Save Page with no changes, the properties are
being updated but the previous value is not deleted, and so we end up with
double valued properties.

I have also found that sometimes when I click edit, make some changes and then
Save page, I find that the Time Stamp property contains two values, one second
apart. I guess this is effectively the same bug as mentioned above.


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