RE: RDF Datasets with provenance data

Hi David and Mark, 
both your answer were not helpful,  sorry. 
We are looking for triple datasets that have Metadata, i.e. serialized downloadable files in any format (N3,  nquad,  trix,  etc)  that come with sensible metadata (provenance,  last updated/update frequncy)  or as an alternative triples converted from a legacy source where we could extend the extractor software easily to spew out useful metadata per triple. 

An example would be the datasets in the meta section here: http://www.mpi-inf.mpg.de/departments/databases-and-information-systems/research/yago-naga/yago/downloads/

Thanks, 
Sebastian 

Am 23. September 2016 17:16:43 MESZ, schrieb Mark Wallace <mwallace@modusoperandi.com>:
>I like David's guidance.
>
>We have projects which require provenance on individual facts/triples
>(as opposed to groups of them).  As David mentions, one alternative is
>to use a named graph for each triple (it acts like a statement ID in
>this case).  An alternative is to use RDF Reification[1] to create a
>statement ID (resource) to which provenance can be "attached."  The
>reification approach requires lots more triples, but it has the
>advantage in our case of leaving named graphs for other uses.   In such
>cases, provenance triples can be 10x larger than the data set.  For
>performance reasons, we sometimes put the provenance triples in a
>separate repository/store, and query/join them (using federated
>queries) only when the provenance is needed. 
>
>[1] https://www.w3.org/TR/rdf11-mt/#whatnot
>
>--
>Mark Wallace
>PRINCIPAL ENGINEER, SEMANTIC APPLICATIONS
>MODUS OPERANDI, INC.
>
>-----Original Message-----
>From: David Booth [mailto:david@dbooth.org] 
>Sent: Friday, September 23, 2016 10:45 AM
>To: Kay Müller <kay.mueller@informatik.uni-leipzig.de>;
>semantic-web@w3.org
>Cc: Johannes Frey <frey@informatik.uni-leipzig.de>; Sebastian Hellmann
><hellmann@informatik.uni-leipzig.de>
>Subject: Re: RDF Datasets with provenance data
>
>On 09/23/2016 10:07 AM, Kay Müller wrote:
>> Dear Sir/Madam,
>>
>> My name is Kay Mueller and I am a researcher at the University of 
>> Leipzig. Currently we are planing to evaluate whether it is feasible 
>> to store provenance and meta data for each triple in a graph, hence
>we 
>> are wondering whether you are aware of any dataset which either
>stores 
>> data at the triple level or which could be converted into this format
>(e.g.
>> Yago, Wikidata).
>
>The usual technique for associating provenance or other metadata with
>certain triples is to put those triples into a named graph, and make
>the provenance/metadata assertions about that named graph.  A named
>graph can hold any number of triples, so it could hold a single triple
>if you want to be that fine grained.  But triples are not usually
>created individually -- they are usually created in bunches -- so for
>efficiency one would usually create a named graph containing multiple
>triples that all have the same provenance.
>
>All major "triplestores" -- quad stores really -- and SPARQL servers
>support named graphs.
>
>David Booth
>
>>
>> We would be very grateful, if you could give us any pointers to 
>> datasets, related work, etc.
>>
>> Thank you very much in advance.
>> --
>> Kind regards / Mit freundlichem Gruß
>>
>> Kay Müller
>>
>> AKSW/KILT <http://aksw.org/Groups/KILT.html>
>>  Office: InfAI e.V., Hainstr. 11, Room 101a, 04109 Leipzig, Germany
>> Homepage: http://aksw.org/KayMueller.html My Twitter 
>> <https://twitter.com/mullekay> My LinkedIn 
>> <https://de.linkedin.com/in/mullerkay> My Xing 
>> <https://www.xing.com/profile/Kay_Mueller12> My GitHub 
>> <https://github.com/mullekay> My Google Scholar 
>> <https://scholar.google.de/citations?user=8tFijv0AAAAJ>
>>
>>

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