Re: Loupe - a tool for inspecting and exploring datasets

Thanks a lot Alvaro for your feedback! There was a small error in the
dataset search and it's fixed now.

The correct URL should've been
http://loupe.linkeddata.es/loupe/summary.jsp?dataset=engdbp

Best Regards,
Nandana


On Thu, Oct 8, 2015 at 6:18 PM, Alvaro Graves <alvaro@graves.cl> wrote:

> 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.
>>
>
>