This page shows the results of a quality assessment performed using the Linked Data Quality model (LDQM) and LD Sniffer tool. The resources evaluated include a subset of DBpedia resources (dbo:Person and dbo:Place instances).

In addition to the analysis shown in this page, you can query further details using the SPARQL endpoint or download the RDF dumps from datahub.

Metrics

This section shows the metrics used for the assessment. These metrics are grouped into base measures, derived measures, and indicators.
Indicators Derived Measures Base Measures
Average IRI dereferenceability Number of dereferenceable IRIs Number of distinct IRIs
Average subject dereferenceability Number of dereferenceable subjects Number of distinct subjects
Average predicate dereferenceability Number of dereferenceable predicates Number of distinct predicates
Average object dereferenceability Number of dereferenceable objects Number of distinct objects
IRI dereferenceability

Statistics

This section shows the high-level statistics about the evaluation for both dbo:Person and dbo:Place instances.
dbo:Person - Quality Assessment Statistics
Key Value
# of dbo:Place Instances 60,308
# of Quality Measurements 1,963,723
# of problematic IRIs 311,946
Explore more statistics in
dbo:Place - Quality Assessment Statistics
Key Value
# of dbo:Place Instances 60,308
# of Quality Measurements 1,963,723
# of problematic IRIs 311,946
See more in Loupe

Average IRI Dereferenciability

This section shows the distribution of average IRI dereferenciability of the dbo:Person instances in the DBpedia dataset.
Average Dereferenceability (dbo:Person)
Average Dereferenceability (dbo:Place)

HTTP Staus Codes

This section shows the distribution of the erroneous status codes returned by the IRIs contained in the resources (instances of dbo:Person and dbo:Place) in the DBpedia (English, 2015-04) dataset.
dbo:Person
dbo:Place

Domains with most errors

This section shows the top 10 domains that returned errors when dereferencing resources from their domains. Pleae note that some of these errors are due to rate limiting from the servers.
dbo:Person
Domain # of errors
yago-knowledge.org 29,494
dbpedia.org 9,402
de.dbpedia.org 8,486
it.dbpedia.org 5,923
pt.dbpedia.org 510
zitgist.com 230
en.wikipedia.org 209
es.dbpedia.org 197
id.dbpedia.org 149
data.nytimes.com 142
dbo:Place
Domain # of errors
yago-knowledge.org 34,734
dbpedia.org 32,302
it.dbpedia.org 11742
de.dbpedia.org 10421
inkedgeodata.org 4446
pt.dbpedia.org 963
nl.dbpedia.org 833
gadm.geovocab.org 785
geonames.usgs.gov 365
www.rdfabout.com 357