A visual language for a sketch-based UI prototyping tool

@inproceedings{Lin1999AVL,
  title={A visual language for a sketch-based UI prototyping tool},
  author={James Lin},
  booktitle={CHI Extended Abstracts},
  year={1999}
}
We describe the design of the visual language for SILK 2.0, a sketch-based tool for prototyping user interfaces. The new SILK visual language has been designed to allow user interface designers to quickly prototype the behavior of a user interface. This includes behavior that depends on the state of certain UI elements and the ability to create "sketchy" components to be reused in other sketches.