table name to find fields of an infocube, sap bi

I need to prepare a spec for all the fields from an infocube. Please tell me an easy way to document the fields from an infocube. I mean there should be some table in sap bi where we can export the fields to excel and there on copy it to a word doc. Please tell me the infocube table name where we have all the iobj field names. Hope you got my requirement.

thanks,

Daniel