1. observational data

    https://coar-rt.empedokl.es/FF4C-28RK

    Data resulting from observational research, which involves collecting observations as they occur (for example, observing behaviors, events, development of condition or disease, etc.), without attempting to manipulate any of the independent variables. [Source: Adapted from https://ddialliance.org/Specification/DDI-CV/ModeOfCollection_3.0.html]

  2. other

    https://coar-rt.empedokl.es/c_1843

    A resource type that is not included in existing terms. [COAR definition]

  3. other periodical

    https://coar-rt.empedokl.es/QX5C-AR31

    A resource type that is not included in existing terms under the top concept "Text". [COAR definition]