2. Composition

• Describe domain-specific concepts as compositions:
  • a Bulb is a Resistor to Electricity producing Light
  • a Camera is a Device for the Recording of Images
  • a Battery is a Producer of Electricity
  • a Wire is a Conduit of Electricity

• Inference:compute properties of compound concept
  • using axioms from each component
  • on demand, in response to questions

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