Diff between Log files and Trace files

hi
What is the exact differences between Log Files and Trace Files.
And the relevant informative URL/reference materils would be highly appriciated.
Thanks
Sekhar

Hi,
Go through these,
http://help.sap.com/saphelp_nw04/helpdata/en/d1/7b1e40777cdd5fe10000000a155106/frameset.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/0bf8c890-0201-0010-8b8c-fc93fa1f4795
Hope it clarifies
Regards
Srinivasan T

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