Default OLAP cubes documentation

Hi All

Where I can found the default OLAP cubes documentation that are provided with Microsoft Dynamics AX?

We have a lot of a continious changes in OLAP. and  we have many our users which would like to know about the changes.

I need a good example of OLAP cube documentation or may be a good software for that.

What program do you use to discribe Measures and Dimensions of OLAP cubes?

I need  software that illustrates what dimensions are in Dynamics AX  and then how to use them in an OLAP cube.

thank you.