Frans,
> On 30 Jan 2015, at 16:29, Frans Knibbe | Geodan <frans.kni...@geodan.nl>
> wrote:
>
> On 2015-01-30 13:49, Marco Tenti wrote:
>> Ty very much for the response Frans, I'm lucky and the "others" virtuoso
>> server that I use have this property so problem fixed, but for the future,
>> if i found one that haven't(as the property of the dataset mean) there are
>> other solutions that you know?
>> Greetings and ty again for the response solve many problems .
>
> If there is no specification of dcterms:modified you could look if there are
> any other dates or timestamps in de metadata. The dataset could have a
> specification of dcterms:valid for instance. Or if it has only a publication
> date (dcterms:issued for instance), one could assume that there have been no
> updates after the first publication.
>
> I am not an expert on Virtuoso, but I think that getting the modification
> times of (collections of) triples is not possible for regular users, unless
> these data are explicitly published. I can imagine that is could be possible
> for administrators to get that information from the transaction log.
[Hugh] You are thinking ahead as ever :) A transaction log is what would need
to be read to possibly collate such information as SPARQL does not specifiy a
means of doing this automatically. And we have written the following function
for reading transaction logs based on previous requests from users to know when
SPARQL updates have been performed:
http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtTransactionLogsRead
I hope this helps you Marco ...
Regards
Hugh
>
> Regards,
> Frans
>
>>
>> 2015-01-30 11:51 GMT+01:00 Frans Knibbe | Geodan <frans.kni...@geodan.nl
>> <mailto:frans.kni...@geodan.nl>>:
>> On 2015-01-27 8:29, Marco Tenti wrote:
>>> Hi, everyone, I need to know as user when the content of the virtuoso
>>> server (the triples) where i''m doing the queries was last updated or
>>> modified.
>>> Is there a way to know through SPARQL? or anyway of knowing without be the
>>> server administrator?
>>> Ty in advance.
>>
>> Hello Marco,
>>
>> Wouldn't it be possible to update the dataset metadata to reflect the time
>> of the last update? I think most users would look for dcterms:modified.
>>
>> Greetings,
>> Frans
>>
>>>
>>>
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>>
>> Frans Knibbe
>> Geodan
>> President Kennedylaan 1
>> 1079 MB Amsterdam (NL)
>>
>> T +31 (0)20 - 5711 347 <tel:%2B31%20%280%2920%20-%205711%20347>
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>> Dive into the World of Parallel Programming. The Go Parallel Website,
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>> hub for all things parallel software development, from weekly thought
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>
>
> Frans Knibbe
> Geodan
> President Kennedylaan 1
> 1079 MB Amsterdam (NL)
>
> T +31 (0)20 - 5711 347
> E frans.kni...@geodan.nl <mailto:frans.kni...@geodan.nl>
> www.geodan.nl <http://www.geodan.nl/> | disclaimer
> <http://www.geodan.nl/disclaimer>
> ------------------------------------------------------------------------------
> Dive into the World of Parallel Programming. The Go Parallel Website,
> sponsored by Intel and developed in partnership with Slashdot Media, is your
> hub for all things parallel software development, from weekly thought
> leadership blogs to news, videos, case studies, tutorials and more. Take a
> look and join the conversation now.
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hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
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