Basic Inventory / Inventory Plugin

Hi,

Can someone tell me what table holds the basic inventory sent by the client? Also, is there a article describing what is captured as part of the basic inventory? Does a hardware inventory policy capture the same information? Are the two kept in the same table or different ones? I assume data captured as part of an inventory policy is kept in the HWComputerSystem table. Finally I am trying to determine if basic inventory captures information such as manufacturer and model. If that information is not captured by basic inventory any ideas as to why these fields would be blank, i.e. missing information such as manufacturer and model?