Can we use Dwpts part of special subframe (TD LTE) for Data Transmission?

4G LTE
1

Hi All,
Can we use Dwpts part of special subframe (TD LTE) for data transmission or not?
Uppts, what I understnd, mainly used for RACH transmission. Is it correct?

2

We can use DwPTS for data transmission, UpPTS is mainly used for SRS.

3

Thanks. I think last symbol of special subframe is used for SRS.

4

For Subframe configuration 7, we can use for DL data transmission.
For sunframe configuration 5, we cannot use DwPts for data.
So only CRS will be transmitted in these symbols.