7. The computer system of claim 3 , wherein the object includes a figure or table, the figure or table having identifiers of an independent variable and a dependent variable, the identifiers being specific attributes defined by the extraction rules to be extracted with the object.
3. The computer system of claim 1 , wherein the object data is based on predetermined attributes associated with the object and extracted from the object responsively to extraction rules specifying types of the predetermined attributes to be identified and extracted.