---
title: "AggregationInstanceSource Element (ASSL) | Microsoft Docs"
ms.custom: ""
ms.date: "03/06/2017"
ms.prod: "sql-server-2016"
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ms.technology: 
  - "analysis-services"
  - "docset-sql-devref"
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ms.topic: "reference"
apiname: 
  - "AggregationInstanceSource Element"
apilocation: 
  - "http://schemas.microsoft.com/analysisservices/2003/engine"
apitype: "Schema"
applies_to: 
  - "SQL Server 2016 Preview"
helpviewer_keywords: 
  - "AggregationInstanceSource element"
ms.assetid: ab58c817-eb2b-4974-8470-2946ca5affea
caps.latest.revision: 12
author: "Minewiskan"
ms.author: "owend"
manager: "erikre"
---
# AggregationInstanceSource Element (ASSL)
  Identifies the source of data for user-defined aggregation instances bound to a [Partition](../../../analysis-services/scripting/objects/partition-element-assl.md) element.  
  
## Syntax  
  
```xml  
  
<Partition>  
   ...  
   <AggregationInstanceSource xsi:type="DataSourceViewBinding">...</AggregationInstanceSource>  
   ...  
</Partition>  
```  
  
## Element Characteristics  
  
|Characteristic|Description|  
|--------------------|-----------------|  
|Data type and length|[DataSourceViewBinding](../../../analysis-services/scripting/data-type/datasourceviewbinding-data-type-assl.md)|  
|Default value|None|  
|Cardinality|0-1: Optional element that can occur once and only once.|  
  
## Element Relationships  
  
|Relationship|Element|  
|------------------|-------------|  
|Parent elements|[Partition](../../../analysis-services/scripting/objects/partition-element-assl.md)|  
|Child elements|None|  
  
## Remarks  
 If this element is missing or set to a blank string, the data source view of the cube that owns the partition is used by default.  
  
 For additional information about the **Binding** type, including tables of Analysis Services Scripting Language (ASSL) objects of the **Binding** type and the inheritance hierarchy of **Binding** types, see [Binding Data Type &#40;ASSL&#41;](../../../analysis-services/scripting/data-type/binding-data-type-assl.md).  
  
 For an overview of data bindings in ASSL, see [Data Sources and Bindings &#40;SSAS Multidimensional&#41;](../../../analysis-services/multidimensional-models/data-sources-and-bindings-ssas-multidimensional.md).  
  
## See Also  
 [Properties &#40;ASSL&#41;](../../../analysis-services/scripting/properties/properties-assl.md)