Trends and issues in establishing interoperability among knowledge organization systems
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DCMI '08 Proceedings of the 2008 International Conference on Dublin Core and Metadata Applications
Modeling classification systems in SKOS: some challenges and best-practice recommendations
DCMI '09 Proceedings of the 2009 International Conference on Dublin Core and Metadata Applications
Artificial Intelligence: Foundations of Computational Agents
Artificial Intelligence: Foundations of Computational Agents
A method to convert thesauri to SKOS
ESWC'06 Proceedings of the 3rd European conference on The Semantic Web: research and applications
Characterizing the semantic web on the web
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
A survey of the web ontology landscape
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
Implementing archaeological time periods using CIDOC CRM and SKOS
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part I
Using SKOS vocabularies for improving web search
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Proceedings of the 9th International Conference on Semantic Systems
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Web Semantics: Science, Services and Agents on the World Wide Web
Ontology paper: Key choices in the design of Simple Knowledge Organization System (SKOS)
Web Semantics: Science, Services and Agents on the World Wide Web
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We present a survey of the current state of Simple Knowledge Organization System (SKOS) vocabularies on the Web. Candidate vocabularies were gathered through collections and web crawling, with 478 identified as complying to a given definition of a SKOS vocabulary. Analyses were then conducted that included investigation of the use of SKOS constructs; the use of SKOS semantic relations and lexical labels; and the structure of vocabularies in terms of the hierarchical and associative relations, branching factors and the depth of the vocabularies. Even though SKOS concepts are considered to be the core of SKOS vocabularies, our findings were that not all SKOS vocabularies published explicitly declared SKOS concepts in the vocabularies. Almost one-third of the SKOS vocabularies collected fall into the category of term lists, with no use of any SKOS semantic relations. As concept labelling is core to SKOS vocabularies, a surprising find is that not all SKOS vocabularies use SKOS lexical labels, whether skos:prefLabel or skos:altLabel , for their concepts. The branching factors and maximum depth of the vocabularies have no direct relationship to the size of the vocabularies. We also observed some common modelling slips found in SKOS vocabularies. The survey is useful when considering, for example, converting artefacts such as OWL ontologies into SKOS, where a definition of typicality of SKOS vocabularies could be used to guide the conversion. Moreover, the survey results can serve to provide a better understanding of the modelling styles of the SKOS vocabularies published on the Web, especially when considering the creation of applications that utilize these vocabularies.