1. A method of generating a unique representation of a physical asset from a plurality of system-specific datasets associated with a plurality of systems, each system-specific dataset representing, in a system-specific data format, the physical asset and comprising system-specific information about the physical asset, the method comprising: mapping each of the system-specific datasets into a global system-specific dataset based on a global data model; and merging each of the global system-specific datasets into one global dataset based on the global data model, the global dataset uniquely representing the physical asset and comprising information about the physical asset from the plurality of systems, wherein the merging is based on a set of rules.