Archivo is an online ontology interface and augmented archive, that discovers, crawls, versions and archives ontologies on the DBpedia Databus. Each Databus Artifact represents one certain ontology and each version represents a new version of the ontology.
To download the latest version use
http://archivo.dbpedia.org/download?o={ontology-URI}&f={file-extension}
and Archivo redirects to the latest version that is backed up.
The format can be set by using f={ttl,owl,nt}
(optional, default: owl) or by setting the Accept-Header (first one overwrites the latter).
Example:
curl -L "http://archivo.dbpedia.org/download?o=http://advene.org/ns/cinelab/ld&f=ttl"
downloads the latest version of the Cinelab ontology as Turtle file.
By using a GET request with the implemented formats (application/rdf+xml
, application/n-triples
or text/turtle
) as Accept-Headers returns all information about all versions of this URI as RDF.
There are multiple options to find an ontology (snapshot):
Ontologies can be added to Archivo using the add-service of the frontend. But the ontology must fulfill two requirements to be added:
Archivo provides a basic star-rating (not to be confused with the 5 stars of linked data).
Baseline: The minimum requirements a Ontology should fulfill.
All of the following criteria have to be fulfilled: 1) The non-information URI resolves to a machine readable format or a machine readable version of the ontology is deterministically discoverable by other common means. 2) Download was successful 3) Uses a common format implemented by Archivo (rdf+xml, turtle or n-triples) 4) At least one format was found that parses with no or few (negligible) syntactical warnings
A proper ontology declaration was found using rdf:type owl:Ontology
and some form of license could be detected. A high degree of heterogeneity is permissible for this star regarding the used property/subproperty as well as object:license URI (resolvable linked data or web link),xsd:stringorxsd:anyURI
If the ontology fulfills the baseline, it can earn two further stars by using good practises:
We require a homogenized license declaration using dct:license
as object property with a URI (not string or anyURI).
We measure the compatibility with currently available reasoners such as Pellet/Stardog (more to follow) and run available tasks such as consistency checks and classification.
Archivo provides for each version different files:
type-values | sub-cvs | Explaination |
---|---|---|
orig | Snapshot of the original ontology file | |
parsed | Files parsed by rapper, available as owl, nt and ttl | |
OOPS | OOPS-report | |
generatedDocu | human readable documentation by LODE | |
profile | a profile check done by profilechecker | |
shaclReport | validates={minLicense, goodLicense, lodeMetadata} | shacl-report as turtle file |
meta | a JSON file containing some meta info | |
pelletInfo | imports={FULL,NONE} | the pellet info report, with and without imports |
pelletConsistency | imports={FULL,NONE} | the pellet consistency report, with and without imports |
diff | axioms={old,new} | These file contain the added/deleted triples |
Archivo uses four different sources to find potential ontologies: