1. A database storage structure ( 650 ) having a plurality of results from an experiment on one or more samples comprising: one or more result storage tables ( 710 ) for storing the results from the experiment, at least one or more first annotation storage tables for storing a first set of variables, and at least one or more second annotation storage tables for storing a second limited set of variables, the one or more second annotation storage tables being coupled to one or more concordance tables for storing a concordance between the second limited set of variables and a second list of annotations.