@inproceedings{smith2012facetontology,
  title = "Facetontology: Expressive descriptions of facets in the semantic web",
  author = "Smith, Daniel A and Shadbolt, Nigel R",
  year = "2012",
  booktitle = "Joint International Semantic Technology Conference",
  organization = "Springer, Berlin, Heidelberg",
  pages = "223--238",
}