Adding navigational attribute in Info Object.

Question

My staging layer is as below.
Data source1-> DSO1
Data source2-> DSO1
Data Source 3->DSO1
From DSO1 : there are 3 Transformaitons.
DSO -> Info Object “ABC”
DSO1- > DSO2.
DSO1 -> DSO3.
That means. DSO1 , is supplying data to ABC info object and 2 more DSO's.
I need to Enhance Data Source 1, with Field “X”  add it in DSO and then add that field in Navigational attribute of IO “ABC.
I dont need this field “X” in DSO2 and DSO3.
Question :
1) I want to understand its effect on Transformations if I add field in DSO1.
Data source2-> DSO1
Data Source 3->DSO1.
DSO1- > DSO2.
DSO1 -> DSO3.
2) Will all these be inactive ( assuming yes, )
     a. Do I need to retransport all the transformations.
     b.And if Yes, I assume we need to transport DTP’s too.
3) Does adding of navigational attribute affect any other Cubes and DSO  or transformations ,containing the main Info Objects. "ABC"..
Note:  This new navigational attribute is not used in any of the old cubes. it wil be used in new design.

Answer 1

hI,
1. If add any field to DSO1, then incoming and outgoing transformations will go inactive.
2. a. Yes.
    b. Yes.
3. No, but info ABC object transformations may go inactive.
Thanks