Oracle 9i DB Redo Log Issue

Dear all,
1. I am currently working on a project to provide a solution to synchronize 2 databases of different platform.

2. The original database is a Oracle DB and the backup database is a mainframe kind of File Based Database (Non-relational).

3. Currently, I am making use of the Redo Log generated from Oracle DB to synchronize the DB in the mainframe.

4. I would like to get an advise from anyone here on the following:
a. Redo Log uses DML statements that does not have embedded SQL ?
b. Redo Log ALWAYS uses AND for ALL conditions?
c. Redo Log ALWAYS uses "=" for all the condition comparison ?

Hopeful I state myself clear

rgds
David Wong