BODS Transformation category

Hi,

I was checking the BODS Designer tool and observed that in the Transformations Tab, there are three categories for transformations.

1. Data Integrator

2. Data Quality

3. Data Platform

I understand the transformations mentioned in the Data Quality but I do not understand the logic for keeping few transformations in Data Integrator and few in Data Platform?

Any idea??

Thanks,

Akhilesh