Re: Loupe - a tool for inspecting and exploring datasets

Hi Nandana,

I got several 500 errors when trying to use it, for example
http://loupe.linkeddata.es/loupe/dataset?dataset=DBpedia%20(English)

Alvaro Graves-Fuenzalida, PhD
Web: http://graves.cl - Twitter: @alvarograves

On Thu, Oct 8, 2015 at 9:09 AM, Nandana Mihindukulasooriya <
nmihindu@fi.upm.es> wrote:

> Hi all,
>
> We are developing a tool called Loupe [ http://loupe.linkeddata.es ] for
> inspecting and exploring datasets to understand which vocabularies
> (classes, and properties) are used in a dataset and which are common triple
> patterns. Loupe has some similarities to LODStat, Aether, ProLOD++, etc.
> but it provides the ability to dig into more details. It also connects the
> information provided directly to data so that so that one can see the
> triples that correspond to those numbers.  At the moment, it indexes 2+
> billion triples from datasets including DBpedia (17 languages), wikidata,
> Linked Brainz, Bio models, etc.
>
> It's easier to describe what information Loupe provides using an example.
> If we take the DBpedia dataset, first it provides a summary with the number
> of triples, distinct subjects, objects, their composition (IRIs, blank
> nodes, literals), etc. and summary of the other information that we will
> present below.  http://tinyurl.com/loupe-dbpedia
>
> The class explorer provides the list of 941 classes used, number of
> instances per each class, number classes in each namespace etc. It also
> allows you to search for classes. http://tinyurl.com/dbpedia-classes
>
> If we select a concrete class such as dbo:Person, it shows the 13,128
> distinct properties associated with instances of dbo:Person and the
> probability that a given property is found in an instance. It also provides
> a list 438 other types that are declared in dbo:Person instances which can
> be equivalents classes, superclasses, subclasses, etc.
> http://tinyurl.com/dbo-person
>
> The property explorer provides a list of 60347 properties with the number
> of triples, number properties in each namespace etc. It also allows
> searching. http://tinyurl.com/dbpedia-properties
>
> Again, if we select a concrete property such as dbprop:name, it looks at
> all the triples that contain the given property and analyze the subjects
> and objects of those triples. For subjects, it looks at IRI / blank node
> counts and also the their types. For objects, it does the same but
> additionally analyzes literals for numeric, integers, averages, min, max,
> etc. http://tinyurl.com/dbp-name
>
> The triple pattern explorer allows you to search the 3,807,196 abstract
> triple patterns. http://tinyurl.com/dbpedia-triple-patterns
> Or you can select a pattern you are interested, for instance what are the
> properties that connect dbo:Politician to dbo:Criminal
> http://tinyurl.com/politician-criminal
>
> In all these cases, the numbers are directly linked to the corresponding
> triples.
>
> That's a glimpse of Loupe.  We would like to know whether it useful to
> your use cases so that we can keep improving it. It's still in its early
> stages so any feedback on improvements are more than welcome. If are
> interested, we will we doing a demo [1] at ISWC 2015.
>
> Best Regards,
> Nandana Mihindukulasooriya
> María Poveda Villalón
> Raúl García Castro
> Asunción Gómez Pérez
>
> [1] Nandana Mihindukulasooriya, María Poveda Villalón, Raúl García Castro,
> and Asunción Gómez Pérez. "Loupe - An Online Tool for Inspecting Datasets
> in the Linked Data Cloud", Demo at The 14th International Semantic Web
> Conference, Bethlehem, USA, 2015.
>