"In Ontoportal-Astro, ontologies are organized in groups and tagged with categories. Typically, groups associate ontologies from the same project or organization for better identification of the provenance. Whereas categories are about subjects/topics and enable to classify ontologies. As of 2016, Ontoportal-Astro's categories were established in cooperation with FAO AIMS. In 2024, we moved to UNESCO Thesaurus (https://vocabularies.unesco.org). Groups and categories, along with other metadata, can be used on the “Browse” page of Ontoportal-Astro to filter out the list of ontologies."
The International Virtual Observatory Alliance (IVOA) was formed in June 2002 with a mission to "facilitate the international coordination and collaboration necessary for the development and deployment of the tools, systems and organizational structures necessary to enable the international utilization of astronomical archives as an integrated and interoperating virtual observatory."
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The International Planetary Data Alliance (IPDA), founded in 2006, is a closely cooperating partnership to maintain the quality and performance of data (including data formats) from planetary research using instruments in space.
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The goal of the International Heliophysics Data Environment Alliance (IHDEA) is to encourage the use of common standards and services in order to enable sharing of data and to enhance science.
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