canvas.mmd

classDiagram
  class Geometry { }
  class Canvas { }

  class Layer {
  }

  class Operation {
  }
  class NullaryOperation {
  }
  class UnaryOperation {
  }
  class BinaryOperation { }

  class Extend { }

  class Filter { }

  class InnerJoin { }

  class Match { }

  class OptionalJoin { }

  class Project { }

  class Values { }


  Operation <|-- NullaryOperation
  Operation <|-- UnaryOperation
  Operation <|-- BinaryOperation
  NullaryOperation <|-- Match
  NullaryOperation <|-- Values
  UnaryOperation <|-- Extend
  UnaryOperation  <|-- Filter
  UnaryOperation  <|-- Project
  UnaryOperation : +Operation base
  BinaryOperation  <|-- InnerJoin
  BinaryOperation <|-- OptionalJoin
  BinaryOperation : +Operation base
  BinaryOperation : +Operation complement


  Operation : setView(view)
  Operation : getModel()
  Operation : setArguments(arguments)
  Operation : execute()
  Operation : present(view)
  Operation *-- Layer : view

  Canvas o-- Operation : operations
  Canvas o-- Geometry : locations
  Geometry *-- Operation : operation

  Layer : title
  Layer : present(operation)