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

	import idl "../metadataextraction/Affiliation.avdl";

    record DocumentMetadata {
//      ID of the document, foreign key: Document.id ("document" data store)
        string id;

//      affiliations extracted from PDF document
        union { null , array<eu.dnetlib.iis.metadataextraction.schemas.Affiliation> } affiliations = null;
        
    }

}