- TIBCO BusinessEvents®
- Standard
- Instance
- PropertyArray

# Instance.PropertyArray.appendConceptReference()

## Signature

`void appendConceptReference (PropertyArrayConceptReference arr, Concept instance, long time)`

## Domain

ACTION, BUI

## Description

Creates a new `PropertyAtomConceptReference` set to `instance` with initial history timestamp time and adds it to the end of the PropertyArray `arr`. Use instanceY.arr[instanceY.arr@length] = instanceX for appending with system current time.

## Parameters

Name | Type | Description
--- | --- | ---
`arr` | `PropertyArray` | A PropertyArray to append an element to.
`instance` | `Concept` | A value to append to the PropertyArray `arr`.
`time` | `long` | The initial history timestamp.

## Returns

Type | Description
--- | ---
`void` |

## Cautions

Use instanceY.arr[instanceY.arr@length] = instanceX for appending with system current time