ALE change pointer?

Question: Hi All,
Could someone here explain how to use ALE Change Pointer? I have created one generic datasource for Master data. I want to provide delta functionality to this datasource, which cannot be used in this case unlike transaction data. I hope for master data this is done using ALE change pointers. I'll be thankful to anybody who briefly explains how this is done?

Thanks once again...
_________________
Raj

Have a Nice Day:-)

Answer:
Any ideas on the above problem??
_________________
Raj

Have a Nice Day:-)

Answer:
A change document (very similar to an audit trail) is generated whenever there is a change to data (insertion/modification/deletion). The change pointer is literally a pointer that points to the latest action (subsequent ones can be linked) on a table.

You can find the change pointers in the CDHDR and CDPOS tables in the R/3 environment. But I would suggest using a call to the function module CHANGEDOCUMENT_READ to get the delta - essentially an easier and structured way of accessing the change documents.
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