LIS datasorce

Hi,

I need some briefing about LIS DS...how are they delta enabled and whats the logic of setup table.when to fill and delete set up table.

I filled set up table for QM with notification..it showed me 52 records posted but when i do extractor checker with DS 2LIS_05_Q0ITEM i get only 7 records. what can be reason for difference.

Thanks

Prashant