The AIREO TDS specification:
FAIR (findable, accessible, interoperable and re-usable) data principles are at the heart of this specification.
In order to make TDS more re-usable, the specification aims to standardize the metadata to be included with an AIREO TDS and proposes sets of required, recommended and optional metadata elements. These are based on existing OGC and STAC metadata relevant to EO data and ML applications and some describe AIREO innovative elements, also with the aim of ‘FAIR-ifying’ TDS.
A set of Quality Indicator metadata are included, to help data providers publish structured data quality estimates and elements for users. Additional metadata are designed to ensure ‘FAIRness’ of the dataset. A number of metadata elements describe data provenance: source, processing history and feature engineering recipes. Documentation of licence information and details of accessibility are also included. These can be included in automatic checking to estimate how FAIR the data is.
A key innovation is the definition of AIREO Compliance Levels, allowing a user to see at a glance whether a dataset is fully described in metadata and FAIR-compliant, or whether it contains only the required or recommended set of metadata. These would allow the dataset to be used, but it would not be fully characterised in terms of Quality Assurance and documentation.
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