LOD:ontology statistics
From STLab
Contents |
Setup
On this page we list useful statistics of ontologies (vocabularies, schemas, etc). This information about ontologies can be used to compare them and decide on which corpora to use for what.
Proposals
If you have any proposals for different statistics, or vocabularies to include, please state them here.
Statistics / measures explained
- #triples
- #classes
- t/c ratio: triples / classes ratio, gives an idea about how much annotations a class generally has.
- #props: amount of unique properties
- #mappings: alignments with other LOD corpora. Should include total nr mappings, but preferably also nr mappings to specific corpora.
- last update: date of the last update
- update freq: nr of times the ontology is updated
Statistics
World knowledge
| ontology | #triples | #classes | t/c ratio | #props | #mappings | last update | update freq |
|---|---|---|---|---|---|---|---|
| dbpedia | 1 billion | 3.4 million (of which 1.5 million are classified in a consistent Ontology) | 294.1 | ? | 4,887,000 | 2010-4-28 | 3 times per year |
| freebase | constantly | (N/A) | |||||
| [opencyc] | 56,780 | 73,132
| 2008 | ||||
People
| ontology | #triples | #classes | t/c ratio | #props | #mappings | last update | update freq |
|---|---|---|---|---|---|---|---|
| foaf | |||||||
Places
| ontology | #triples | #classes | t/c ratio | #props | #mappings | last update | update freq |
|---|---|---|---|---|---|---|---|
| foaf | |||||||
Lexical
| ontology | #triples | #classes | t/c ratio | #props | #mappings | last update | update freq |
|---|---|---|---|---|---|---|---|
| foaf | |||||||
Misc ontologies
| ontology | domain | #triples | #classes | t/c ratio | #props | #mappings | last update | update freq |
|---|---|---|---|---|---|---|---|---|
| LinkedMDB | movies | |||||||
TVAnytime example
The following TVAnytime manifest file isolates a number of candidate TVA containers for holding LOD-extracted semantic information that can be matched for multimedia recommendation.
Highlighted lines show potential LOD matches that are currently unexplored.
<?xml version="1.0" encoding="UTF-8"?> <tva:TVAMain xml:lang="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mpeg7="urn:tva:mpeg7:2005" xmlns:tva="urn:tva:metadata:2007" xmlns:ug="http://www.few.vu.nl/~schopman/notube/uitzendingGemist.ttl#" publicationTime="2010-06-08T09:30:47.0Z" originID="NIC-ID"> <tva:ProgramDescription> <tva:ProgramInformationTable> <tva:ProgramInformation programId="http://www.uitzendinggemist.nl/index.php/aflevering?aflID=11447702"> <tva:BasicDescription> <tva:Title>Koefnoen</tva:Title> <tva:Synopsis> Humoristisch programma waarin persiflages, sketches, quickies en nepdocumentaires elkaar snel afwisselen. Paul Groot, Owen Schumacher, Plien van Bennekom, Bianca Krijgsman, Marjan Luif en Sander van Opzeeland schetsen hun kijk op het leven en de actualiteiten. Daarin worden zij bijgestaan door diverse gastacteurs. </tva:Synopsis> <!-- <tva:Keyword>key</tva:Keyword> --> <!-- genre --> <tva:Genre href="ug:amusement"/> <tva:Genre href="ug:comedy"/> <tva:Genre href="ug:kunst_cultuur"/> <!-- parental rating guidance --> <tva:ParentalGuidance> <mpeg7:ParentalRating href="urn:dvb:metadata:cs:ParentalGuidanceCS:2007:1.1.2"> <mpeg7:Name>P</mpeg7:Name> <mpeg7:Definition>Suitable for All Ages.</mpeg7:Definition> </mpeg7:ParentalRating> </tva:ParentalGuidance> <!-- credits --> <tva:CreditsList> <tva:CreditsItem role="http://dbpedia.org/ontology/starring"> <tva:PersonName> <mpeg7:FamilyName>Schumacher</mpeg7:FamilyName> <mpeg7:GivenName>Owen</mpeg7:GivenName> </tva:PersonName> </tva:CreditsItem> <tva:CreditsItem role="http://dbpedia.org/ontology/starring"> <tva:PersonName> <mpeg7:FamilyName>Groot</mpeg7:FamilyName> <mpeg7:GivenName>Paul</mpeg7:GivenName> </tva:PersonName> </tva:CreditsItem> </tva:CreditsList> </tva:BasicDescription> </tva:ProgramInformation> </tva:ProgramInformationTable> </tva:ProgramDescription> </tva:TVAMain>
