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

    import idl "extended/DocumentExtendedMetrics.avdl";
    import idl "primary/DocumentPrimaryMetrics.avdl";

    record DocumentMetrics {
        union { null , eu.dnetlib.iis.metrics.primary.schemas.DocumentPrimaryMetrics } primary = null;
        union { null , eu.dnetlib.iis.metrics.extended.schemas.DocumentExtendedMetrics } extended = null;
    }
    
}