HLD, LLD , Mapping Documents

What is high level document(HLD),lowlevel document(LLD),MAPPING documents ? what is the stuff they contains?

gajaa
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Oct 15th, 2014
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Sarat

Nov 13th, 2014

High Level Design document will prepare by the Data Modeling people to generate the required data warehouse schema for the ETL purpose.

LLD : Low Level Design is the design document which will be used at offshore for designing the ETL jobs.

Mapping Sheets are used to design the ETL jobs to map the attributes from Source to transform and transform to target. Depends on requirements of the client