### Abstract

Geared to complement UML and to the specification of large software systems by non-mathematicians, constraint diagrams are a visual language that generalizes the popular and intuitive Venn diagrams and Euler circles, and adds facilities for quantifying over elements and navigating relations. The language design emphasizes scalability and expressiveness while retaining intuitiveness. Spider diagrams form a subset of the notation, leaving out universal quantification and the ability to navigate relations. Spider diagrams have been given a formal definition. This paper extends that definition to encompass the constraint diagram notation. The formalization of constraint diagrams is non-trivial: it exposes subtleties concerned with the implicit ordering of symbols in the visual language, which were not evident before a formal definition of the language was attempted. This has led to an improved design of the language.

Original language | English |
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Title of host publication | Proceedings of the IEEE Symposium on Human Centric Computing Languages and Environments |

Place of Publication | New York, USA |

Publisher | IEEE Computer Society |

Pages | 72-79 |

Number of pages | 8 |

ISBN (Print) | 0780371984 |

DOIs | |

Publication status | Published - 1 Jan 2001 |

Event | Proceedings of the IEEE Symposium on Human Centric Computing Languages and Environments - Stresa, Italy, 5-7 September, 2001 Duration: 1 Jan 2001 → … |

### Conference

Conference | Proceedings of the IEEE Symposium on Human Centric Computing Languages and Environments |
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Period | 1/01/01 → … |

### Keywords

- Visual formalisms
- software specification
- formal methods

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## Cite this

Gil, J. Y., Howse, J., & Kent, S. (2001). Towards a formalization of constraint diagrams. In

*Proceedings of the IEEE Symposium on Human Centric Computing Languages and Environments*(pp. 72-79). IEEE Computer Society. https://doi.org/10.1109/HCC.2001.995241