1. A system comprising: an attributed-data dictionary associated with a control-logic design tool, the attributed-data dictionary being stored in computer memory and specifying mappings of design-tool representations of a plurality of control operators to attributed-data representations of the respective control operators, and an attributed-data template comprising an output variable and metadata variables comprising identifiers for a control operator and associated input and output variables; and a attributed-data generator implemented by one or more processors and configured to receive, from the control-logic design tool, a specification of a control-logic design comprising a plurality of control operators and associated inputs and outputs, and to convert the control-logic design specification into attributed data based on the attributed-data template and the control-operator mappings.