"DataType: FieldName1, Fieldname2,FieldName3"

User: Name, Address
Person: Age, Address,DOB

val dataTypeAndFieldsRegex = """(.+):(.*(,.*)?)""".r

"Person: Age, Address, DOB" match {
  case dataTypeAndFieldsRegex(dataType, fields, _*) => {
    println("dataType: " + dataType)
    println("fields: " + fields)
  }