Manually defining aggregations

The Aggregation Wizard designed the following aggregation, on 2 dimensions.
I understand it is aggregating at the Country level in the StoreGeography dimension. However, in the Time dimension, since it didn't list any attributes, I am wondering where it is aggregating.

Is it at the All level, or is it at the leaf level ?

Thanks for any help.

<Aggregation>
<ID>Aggregation 7</ID>
<Name>Aggregation 7</Name>
<Dimensions>
<Dimension>
<CubeDimensionID>Store Geography</CubeDimensionID>
<Attributes>
<Attribute>
<AttributeID>Country</AttributeID>
</Attribute>
</Attributes>
</Dimension>
<Dimension>
<CubeDimensionID>Time</CubeDimensionID>
</Dimension>
</Dimensions>
</Aggregation>

That's right: In case and if no attribute specified for a dimension in the definition of the aggregation, the aggregation contains data for dimension on level "All" for the dimension.

Edward Melomed.
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