I would like to establish a list of ontologies/vocabularies that match the following criteria:
Please, I would like you to provide separate answers for each ontology/vocabulary you mention so that people can vote individually for an ontology.
Edit: I put here for convenience direct links to the ontologies given in the answers, in order of appearance.
Description: this is a light weight RDFS vocabulary for describing generic metadata.
Project homepage: http://dublincore.org/
Typical prefix: dc: and dcterm:
Which datasets use it: DC is ubiquitous in the Linked Data landscape.
Tools supporting it: the Protégé ontology editor provides DC properties as default annotation properties for ontologies and ontological terms. Providing DC annotations is also very common in other Semantic Web editors.
Technicalities: DC is a moderately small ontology divided into 2 vocabularies: DC elements and DC terms. DC elements contain 15 properties. DC terms contain 22 classes and 55 properties. It is not an OWL 2 DL ontology because it does not rely at all on the OWL constructs. This actually makes it a very simple ontology to reason with. Since the terms are weakly constrained, it is often the case that ontologies reusing them are redefining the terms internally instead of importing the DC ontology. This way, it is possible to choose, e.g., whether the properties are AnnotationProperties, etc. without breaking the compatibility with, for instance OWL DL.
This answer is marked "community wiki".
answered 27 Aug '10, 18:33
Antoine Zimm... ♦
Description: this ontology is used to describe people and social relationship on the Web. It is mostly focused on people's existence in the virtual world, with many properties related to online activity or identity: foaf:mbox, foaf:skypeID, foaf:msnID, foaf:geekcode, etc. Nothing about family relations, physical address... It provides similar information on organisations or groups with a similar focus on their existence on the Web (work place webpage, etc). It is particularly well suited for describing people on Web-based Social platforms (facebook, twitter, blogspot, ...).
Project homepage: http://www.foaf-project.org/
Typical prefix: foaf:
Which datasets use it: FOAF is used on many different websites. The list would be too long for this page. Notable examples are: Live Journal, etc. Many computer scentists in the Semantic Web field all over the world are publishing their personal FOAF file.
Tools supporting it: FOAF-a-Matic is a Web-based app which allows the user to create a FOAF file quickly by entering natural language text information in a Web form. The Wiki of the FOAF project has a webpage listing many FOAF-related tools.
Technicalities: FOAF is a rather small ontology (19 classes, 44 object properties, 27 datatype properties). It is not an OWL 2 DL ontology because it relies on inverse functional datatype properties. However, appart fron this small issue and minor syntactical issues, the ontology is essentially compatible with OWL 2 RL, which means it is particularly suitable for materialising implicit knowledge about FOAF data in a triple store.
answered 27 Aug '10, 18:37
Antoine Zimm... ♦
Description: this ontology is used to describe information related to the music industry. It does not provide any means to describe in detail the music itself (notes, instruments, rythms, etc) but focus more on releases, live events, albums, artists, tracks that characterise most of the business-related information about music that can be found on the Web.
Project homepage: http://musicontology.com/ (it's just the spec page)
Typical prefix: mo: or music:
Which datasets use it: the BBC is using it to describe its musical programmes (http://www.bbc.co.uk/music/reviews/j5xm.rdf).
Tools supporting it: DBtune.
Technicalities: The Music Ontology is a moderately large ontology, which imports 3 external ontologies, which in turn import 2 additional ones. In total, the import closure defines 141 classes, 260 object properties, 131 datatype properties and 86 individuals. The atomic ontology itself defines 76 classes, 142 object properties, 34 datatype properties and 14 individuals. It is not properly speaking an OWL DL ontology due to small syntactic problems, but it essentially relies on DL constructs. It is fairly expressive, such that it cannot be treated as part of any of the sublanguages of OWL 2 DL.
answered 27 Aug '10, 19:13
Antoine Zimm... ♦
Description: a vocabulary and a set of instructions that enables the discovery and usage of linked datasets.
Project homepage: http://vocab.deri.ie/void
Which datasets use it: Fairly widely deployed; some examples include:
Tools supporting it:
Technicalities: Lightweight RDFS vocabulary containing 3 classes and 13 properties. voiD vocabulary directly re-uses terms from
Description: this ontology is used to describe online communities such as forums, blogs, mailing lists, wikis. It complements FOAF by stressing on the description of the products of those communities (posts, replies, threads, etc).
Project homepage: http://sioc-project.org/
Typical prefix: sioc:
Which datasets use it: SIOC is used on many different websites. Notable examples are: identi.ca (http://identi.ca/danbri/foaf) or CC car pictures (http://carpictures.cc/cars/photo/index.rdf). See also a list of (mostly broken) links to sites using SIOC.
Tools supporting it: most notably, Wordpress and Drupal have a module supporting it. There is a page that references many applications using SIOC.
Technicalities: SIOC is a lightweight ontology (17 classes, 61 object properties, 25 datatype properties). It is essentially in OWL 2 DL, with tiny syntactical issues that strictly speaking makes it a non DL ontology. It only relies on OWL 2 RL constructs. There exists other "subvocabularies" for SIOC with domain names http://rdfs.org/sioc/xxxx# but I am not aware whether these ones are used or supported.
Description: this ontology is used to describe products sold online. It is especially useful to online stores with a great diversity of products.
Project homepage: http://purl.org/goodrelations/
Typical prefix: gr:
Which datasets use it: BestBuy.com announced that they are publishing RDF descriptions of their products, using Good Relation ontology. O'Reilly as well, in RDFa (http://oreilly.com/catalog/9780596007683). See also a list of examples in the wild.
Tools supporting it: List of applications.
Technicalities: Good Relations is a moderately small ontology (27 classes, 43 object properties, 37 datatype properties and 43 individuals). It is a perfectly valid OWL DL ontology. It is fairly expressive, such that it is not in any of the 3 OWL 2 profiles.
answered 27 Aug '10, 19:01
Antoine Zimm... ♦
The Provenance Vocabulary
Description: The Provenance Vocabulary enables providers of Linked Data to describe the provenance of their data.
Project homepage: http://purl.org/net/provenance/
Typical prefix: prv:
Documentation: http://purl.org/net/provenance/ns.html http://purl.org/net/provenance/guide
Which datasets use it: The Provenance Vocabulary is used by many linked datasets. Examples are: the Traditional Chinese Medicine (TCM) dataset (example URI: http://purl.org/net/tcm/tcm.lifescience.ntu.edu.tw/id/gene/MAPT ) or the blog of the Agile Knowledge Engineering and Semantic Web (AKSW) research group at the University of Leipzig (example URI: http://blog.aksw.org/triplify/post/130 )
Tools supporting it: The Linked Data publishing tools Triplify, Pubby, and D2R Server contain metadata extensions that, by default, provides provenance information described using the Provenance Vocabulary.
Technicalities: The Provenance Vocabulary is defined as an OWL 2 DL ontology and it is partitioned in a core ontology and supplementary modules. The core ontology consists of 13 classes, 17 object properties, and 1 datatype property.
answered 27 Aug '10, 20:20
The Linked-Open Vocabularies tool (LOV) provides navigation across ontologies used to describe dataset published on CKAN. - It includes references to other vocabularies - Each vocabulary is used in at least one Dataset - Nothing is said about tool support
answered 18 Apr '11, 13:09
Simple Knowledge Organization System (SKOS)
Description: a W3C standard ontology for describing thesauri, taxonomies, and other controlled vocabularies.
Project homepage: http://www.w3.org/2004/02/skos/
Typical prefix: skos:
Which datasets use it: Library of Congress and New York Times subject headers, United Nations Food and Agriculture Organization's AGROVOC thesaurus, NASA, IPTC, lots more. See http://www.w3.org/2001/sw/wiki/SKOS/Datasets.
Tools supporting it: TopQuadrant's EVN, PoolParty, SKOSed plugin for Protege,iQvoc, TemaTres
answered 19 Apr '11, 09:05