General Information

Welcome to our website for the evaluation of ontology metrics. The evaluation of the metrics is carried out for a corpus of ontologies and has two main steps: Calculation of the values of the metrics using the corpus of ontologies, and analysis of the metrics.

The corpus of ontologies

  • The ontologies must be publicly available in OBO or OWL format.
  • The corpus of ontologies has to be provided as a list of <acronym;ontology-download-URL>
  • Some sample corpus are provided in our Examples page.

Calculating the metrics

  • 19 metrics are calculated for each ontology using the OQuaRE web service.
  • The process discards ontologies that cannot be processed or that contain unsatisfiable classes. Such aspects are reported in the log of the process
  • The metrics for corpora with less than 5 ontologies will be obtained, but the results won't be processed by the analysis method.
  • The calculation of the metrics is time consuming for large ontologies and corpora, so a link to the results will be sent by email to the user as soon as the task is completed.
  • The result is a ZIP file which contains the log of the process, an XML file per ontology with the values of the metrics and a CSV that holds a table of the values of each metric for each ontology.
  • Some sample files are provided in our Examples page.

Evaluating the metrics

  • The correlations between the 19 metrics, their stability and goodness of their classifications will be evaluated.
  • Metrics with less than 5 different measurements will not be included in the evaluation. This will be reported in the log file.
  • The input is the ZIP file generated in the previous step
  • The evaluation of the metrics does not require much time, but the user has the possibility of getting a link to the results by email as soon as the task is completed.
  • The result is a ZIP file which contains a series of files: the log, 2 CSV data files with the stability and silhouettes for each metric, the image of the global stability of the metrics in different image formats and 19 PDF files with the images corresponding to the data files.
  • For additional information of the meaning of the results, please check our page on interpretation of the results.

Execution


Step 1: Calculation of the metrics


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