A technique for determining the relative relevance of electronic documents based on metadatacontent associated with the document as a whole andor metadatacontent associated with one or more subdivisions of the electronic document. The device comprises a first imaging sensor, a second imaging sensor and a light transfer arrangement receiving illumination reflected from an object and aiming the illumination at at least one of the first and second imaging sensors. In all three modes the tool is comparing the live data from PIDS and voltage to the other information.