Re: [Bigdata-developers] URI equivalence in Blazegraph 1.5.2

[Michael S. <ms...@me...>]

Dear Reul,

according to the standard, in RDF/SPARQL IRIs (a generalisation of URIs, which again generalize URLs) are considered case sensitive — which is, as you noticed, different from the way URLs are typically interpreted by Web servers or the interpretation of email addresses:

See http://www.w3.org/TR/2014/REC-rdf11-concepts-20140225/ <http://www.w3.org/TR/2014/REC-rdf11-concepts-20140225/>

"Two IRIs are equal if and only if they are equivalent under Simple String Comparison according to section 5.1 <http://tools.ietf.org/html/rfc3987#section-5.1> of [RFC3987 <http://www.w3.org/TR/2014/REC-rdf11-concepts-20140225/#bib-RFC3987>]”, where section 5.1 of the RFC essentially defines a character-by-character comparison of the IRIs.

Best,
Michael


> On 24 Nov 2015, at 03:00, Reul, Quentin <que...@wo...> wrote:
> 
> Hi all,
>  
> I have a small questions about how the equivalence between 2 URIs are calculated in Blazegraph 1.5.2. I observed that difference in cases in URIs (e.g. use of lower case vs. capitals) had an impact on the calculation of equivalence. In a namespace, I had loaded information about a resource (i.e. <mailto:Que...@wo... <mailto:Que...@wo...>>) and this resource has a label to define the human readable name of the resource. Another applications was adding triples including this resource containing slightly different case (i.e. <mailto:que...@wo... <mailto:que...@wo...>>). Based on my experience with mail clients and browser, I would have assumed that Blazegraph would have considered the two variants as a single instance of the same reason.
>  
> Is there something that I am missing?
>  
> Kind regards,
>  
> Quentin Reul 
> Advanced Technology | Global Platform Organization | +1 (917) 891 5490 
> Email: Que...@wo... <mailto:Que...@wo...>
> Skype: quentin_reul
>  
> ------------------------------------------------------------------------------
> Go from Idea to Many App Stores Faster with Intel(R) XDK
> Give your users amazing mobile app experiences with Intel(R) XDK.
> Use one codebase in this all-in-one HTML5 development environment.
> Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs.
> http://pubads.g.doubleclick.net/gampad/clk?id=254741551&iu=/4140_______________________________________________ <http://pubads.g.doubleclick.net/gampad/clk?id=254741551&iu=/4140_______________________________________________>
> Bigdata-developers mailing list
> Big...@li... <mailto:Big...@li...>
> https://lists.sourceforge.net/lists/listinfo/bigdata-developers <https://lists.sourceforge.net/lists/listinfo/bigdata-developers>