1. A method for processing informational items of low information content originating from a plurality of diverse information sources into a derived document suitable for selected topical analysis thereof, comprising: collating via a processor, informational items from a one of the sources in accordance with a predetermined plurality of relevant attributes of the low information content, and a key property value common to selected ones of the relevant attributes wherein the informational items individually lack sufficient content for the selected topical analysis; grouping via the processor, all informational items from the plurality of diverse information sources associated with the key common property value to form an enlarged document having a grouped content sized for the selected topical analysis, wherein the informational items therein are marked by the informational source thereof; and, analyzing the document for topical identification.