INSPIRE Synonyms - RDF files

This dataset is part of the ELISE action study "using synonyms to improve the discovery of spatial data resources", result of applying the suggested methodology by using the synonymous Finder tool to collect synonyms and related terms.

The Synonym finder tool creates a dataset in CSV format that reflects the table visible in the interface. This table can be reloaded in the interface, and after loading, the user can continue working on it. The second dataset is in RDF format only contains the ‘end result’: where relevant links between INSPIRE registry entities and related concepts in other resources, and preserved alternative terms for the INSPIRE concepts. For each of the three use cases, noise, agriculture and water, two CSV files and an RDF file are provided.

The RDF file contains an rdf:Description element for each entry in the original list of terms.

The subject – predicate –object information of the CSV file is added to these elements, but only for those entries accepted by the operator (this matches the content of the *_final_selected.csv’ file). If for an original input term no information is preserved, the rdf:Description element in the file is empty.

The synonyms tool provides two types of information:

  • relations to concepts in other resources and alternative terms harvested from other resources. If the object of an accepted line in the tool is a concept in another vocabulary, the result is a semantic relation between the INSPIRE concept and that other concept. For synonyms, the relations skos:exactMatch or skos:closeMatch are used. Hypernyms are linked with the relation skos:broadMatch and hyponyms have a skosnarrowMatch connection. If the type of relationship is not fully clear, a more generic skos:relatedMatch can also be used.
  • If, on the other hand, the object of a selected line in the table is a text label, this results in an RDF statement providing an alternative label for the original INSPIRE concept. For exact or close matches the predicate skos:altLabel (alternative label) is used. Hyponyms and hypernyms cannot be considered alternative terms for the original concept. Therefore these terms are provided as skos:hiddenLabel. A hidden label is used by machine-to-machine communication and will be used by the search engine, but it will not be visible in any graphical user interface.  

It must be noted that the relation of the output always is defined towards the original input term. Suppose the output is a synonym of a hyponym of the original input. In that case, it will be indicated as a narrower (hyponym) in the RDF file, not as a synonym.

The online RDF Validation service of the World Wide Web Consortium (W3C) is used to validate the RDF output created for the three use cases.