Set default custom field value based on event label

When event label and visit custom field PV values are the same then you can set the custom field default value wrt to visit.

Use case: When you collect the 'PMCT' visit the 'Art der Untersuchung' value should display default as 'PMCT'.

Add below code in JSON dictionary

  {
      "name" : "visit.extensionDetail.attrsMap.art_der_untersuchung",
      "caption" : "Art der Untersuchung",
      "type" : "radio",
      "optional" : true,
      "options" : [ "Klinische Angaben", "Sektion", "PMCT", "PM Ultraschall" ],
      "defaultValue": "field: visit.eventLabel"
    }

Using the above code when you collect the visit the default value will be set.