Mapping Query on receiver IDOC

Hi Experts, 

Can any one help me on my requirement. Which is as follows.

Sender Structure :-

Image may be NSFW.
Clik here to view.

Target Structure :- (IDOC)

Image may be NSFW.
Clik here to view.

Based on the dates which received from Source side to the TYPE field at target side I need to update that date and time.

EX:- If I get the value CreationDate, At the target I need to get CreationDate and its date and time

<CreationDate>

                01/12/2014 13:00:05

</CreationDate>

OR

If I get the calue DocumentDate then I need to get map DocumentDate date and time

<DocumentDate>

                02/12/2014 13:00:05

</DocumentDate>

For this Which fields I receive I have to get those values at the target as shown in the examples. Here YDATE is a different list at ECC and those values store in Tables.

Can you please help me out how to map.

Will appricate for your inputs in advance.

Thanks

G V Anil