@namespace("eu.dnetlib.iis.documentsclassification.schemas")
protocol IIS{

    record DocumentClass {
//      The class assigned to the document.
//      The array stores all labels laying on the path from the root to the
//      leaf assigned to given document in a particular taxonomy tree, e.g.
//      ["Computer Science", "Machine Learning"]
        union { null , array<string> } classLabels = null;
//		Find more details on `confidenceLevel` constraints in eu/dnetlib/iis/README.markdown file.
        union { null , float } confidenceLevel = null;
}

    record DocumentClasses {
//      All classes from arXiv taxonomy assigned to the document.
        union { null , array<DocumentClass> } arXivClasses = null;
//      All classes from WoS taxonomy assigned to the document.
        union { null , array<DocumentClass> } WoSClasses = null;
//      All classes from DDC taxonomy assigned to the document.
        union { null , array<DocumentClass> } DDCClasses = null;
//      All classes from europePMC taxonomy assigned to the document.
        union { null , array<DocumentClass> } meshEuroPMCClasses = null;
//      All classes from ACM taxonomy assigned to the document.
        union { null , array<DocumentClass> } ACMClasses = null;
    }

}