private static BacNetObject createDateTimePatternValue() {
        return b("DateTime Pattern Value",
            p("Object_Identifier", "BACnetObjectIdentifier", c(R)),
            p("Object_Name", "CharacterString", c(R)),
            p("Object_Type", "BACnetObjectType", c(R)),
            p("Description", "CharacterString", c(O)),
            p("Present_Value", "BACnetDateTime", c(R, 1)),
            p("Status_Flags", "BACnetStatusFlags", c(R)),
            p("Event_State", "BACnetEventState", c(O)),
            p("Reliability", "BACnetReliability", c(O)),
            p("Out_Of_Service", "BOOLEAN", c(O)),
            p("Is_UTC", "BOOLEAN", c(O)),
            p("Priority_Array", "BACnetPriorityArray", c(O, 2)),
            p("Relinquish_Default", "BACnetDateTime", c(O, 2)),
            p("Reliability_Evaluation_Inhibit", "BOOLEAN", c(O, 3)),
            p("Property_List", "BACnetARRAY[N] of BACnetPropertyIdentifier", c(R)),
            p("Event_Detection_Enable", "BOOLEAN", c(O, 4, 5)),
            p("Notification_Class", "Unsigned", c(O, 4, 5)),
            p("Event_Enable", "BACnetEventTransitionBits", c(O, 4, 5)),
            p("Acked_Transitions", "BACnetEventTransitionBits", c(O, 4, 5)),
            p("Notify_Type", "BACnetNotifyType", c(O, 4, 5)),
            p("Event_Time_Stamps", "BACnetARRAY[3] of BACnetTimeStamp", c(O, 4, 5)),
            p("Event_Message_Texts", "BACnetARRAY[3] of CharacterString", c(O, 5)),
            p("Event_Message_Texts_Config", "BACnetARRAY[3] of CharacterString", c(O, 5)),
            p("Current_Command_Priority", "BACnetOptionalUnsigned", c(O, 2)),
            p("Value_Source", "BACnetValueSource", c(O, 6, 8, 10)),
            p("Value_Source_Array", "BACnetARRAY[16] of BACnetValueSource", c(O, 7, 9)),
            p("Last_Command_Time", "BACnetTimeStamp", c(O, 7, 9)),
            p("Command_Time_Array", "BACnetARRAY[16] of BACnetTimeStamp", c(O, 9)),
            p("Tags", "BACnetARRAY[N] of BACnetNameValue", c(O)),
            p("Profile_Location", "CharacterString", c(O)),
            p("Profile_Name", "CharacterString", c(O))
        );
    }
a map which maps property to type variants
protocols/bacnetip/src/test/java/org/apache/plc4x/protocol/bacnetip/BACnetObjectsDefinitions.java