         name:
             label: "Reference Short Name"
             type: String
+            min: 1
 
         referenceType:
             label: "Reference Type"

        monographAgent:
            label: "Monograph Agent Name"
            type: String

        volumeNumber:
            label: "Volume Number"

        strengths:
            label: "Principal strengths"
            type: String
            min: 1

        limitations:
            label: "Principal limitations"
            type: String
            min: 1

        notes:
            label: "General notes"
