The SPASE metadata model can be expressed in many forms. One of those forms is as an XML Schema. An XML Schema is a machine readable form (see schema). Here you can find human readable documentation which includes standard model diagrams.
Current Release is 2.5.0 (HTML PDF XSD JSON), released: 2022-09-29, History of changes
Search the model dictionary.
When referencing the Base Model in publications use the DOI: https://doi.org/10.48322/E72C-5Y75
There is a draft version of the data model which includes definitions under consideration for the next production release.
The current draft is 2.5.1 (HTML PDF XSD JSON), generated on: 2023-02-15