Revised grammar error
revised history and checkpointing
revise checkpoints
revised introduction
Not supported foreign keys
Add some information
Revised and add new inforrmation
Refine based on Andy's comments
Revised typo
Edited from isolation levels to the end. Revised DBMS relationship section and the description.
Edit from checkpoints to indexes
Add description, history and some meta-data
wiki url
start year
Updated info