Cognos Cube -Does Data also gets loaded to the cube or only the structure

[cognos05]

Hi,

This is a basic doubt I would like to clear.

I am using flat files as data source , I published a cube and deleted the source flat files to test if the published cube also contains data in it.
When a cube is built , the data that cube refers is also packaged along with  or does it

Is this correct ? what happens when the source for a cube is from access table, does it still take the data at that point of time and packages it while building the cube.
I know the cube is static and have to be built every day,but just confused while picking a data for an intersection does it still go back to source files ?

Thanks,
Nithya