Pha,
For FI Extracts ,
The new / changed data comes into the delta queue. However
The records will not come into the delta queue on creation , they come into the delta queue after what is usually referred to as "Safety Interval"
The safety interval can be changed in the tables in ECC but unless there is a pressing need , you can leave it untouched.
2. what is difference betwen Full/Delta load setting in Infopackage and DTP?
3. i have read Referenzs about creating Process chain, incase i create 2 Infopackages: one delta init and one for the delta load. which one should i use in Process chain?
For questions regarding point 2 and 3 , I would strongly recommend that you search the forums because these questions have been answered many times over.