Hi Daniel,
A possible solution to this problem would be to use the Virtuoso Delta aware
bulk load option which requires the use of NQUAD datasets as detailed at:
http://vos.openlinksw.com/owiki/wiki/VOS/VirtRDFBulkLoaderWithDelete
<http://vos.openlinksw.com/owiki/wiki/VOS/VirtRDFBulkLoaderWithDelete>
Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc. // http://www.openlinksw.com/
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Universal Data Access, Integration, and Management Technology Providers
> On 20 Nov 2017, at 21:10, Davis, Daniel (NIH/NLM) [C] <daniel.da...@nih.gov>
> wrote:
>
> I wish also to clarify – I won’t have blank nodes in any of the graphs I am
> considering, at least for now.
>
> From: Davis, Daniel (NIH/NLM) [C]
> Sent: Monday, November 20, 2017 4:04 PM
> To: virtuoso-users@lists.sourceforge.net
> Subject: Two questions
>
> I am seeking to develop a new way to load updated/changed data into my
> Virtuoso graph. The current way I use involves a lot of churn – I load an
> NTriples file representing the data into an updates graph, and I delete all
> old triples and copy all new triples if the subject (owl:Thing) appears in
> the old graph at all. I also mark all subjects that exist in the old graph
> as “inactive” if they no longer appear in the incoming data, but I do not
> delete them.
>
> I just noticed that rdflib (A python package), includes logic to compare two
> graphs, which can be constructed from a query such as DESCRIBE/CONSTRUCT.
> It also has an implementation of a graph checksum logic based on the
> following paper http://www.hpl.hp.com/techreports/2003/HPL-2003-235R1.pdf
> <http://www.hpl.hp.com/techreports/2003/HPL-2003-235R1.pdf>
>
> Does Virtuoso have a way to check that one graph is the same as another, or
> whether two query solutions are the same?
>
> Dan Davis, Systems/Applications Architect (Contractor),
> Office of Computer and Communications Systems,
> National Library of Medicine, NIH
>
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