Avoid endorsing the Ontology for Measurements, especially in a specific version
- SAREF4ENVI redefines many units from the OM ontology in its version 1.8. These units of measure are only useful for examples, and a global choice should be made in SAREF about which ontology of units of measure to reuse.
- SAREF4AGRI uses the Ontology of Measurement vocabulary, in its version 2. SAREF4ENVI use this vocabulary in a different version 1.8. IRIs of these concepts contain the version number and are thus tied to a specific version. Apart from being redefined in SAREF4AGRI, these units of measure are not used in the ontology. They could be safely deleted.
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Proposal:
Do not declare an external entity such as unit of measure, especially if it is not reused in the ontology.
Use the examples to illustrate how the units of measures may be chosen and defined.