20. The method of claim 16 , wherein the linguistic rules include optical character recognition (OCR) rules, vocabulary rules, syntax rules, or a combination thereof.
16. The method of claim 1 , further comprising accessing a database of diagram-to-graph conversion rules including graph topology rules, graph interconnection rules, linguistic rules, or a combination thereof, wherein applying the functional block recognition rules includes applying one or more of the diagram-to-graph conversion rules to the image data, and wherein the functional graph is computer-generated by applying the one or more of the diagram-to-graph conversion rules to the image data.