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''HydLa'' is a constraint-based hybrid system modeling language.
The key features of HydLa are:
- declarative (cf. procedural) modeling of systems as constraints over real-valued functions,
- description of models using familiar mathematical and temporal logic notations, and
- constraint hierarchies that enable concise modeling of default and exceptional behaviors.

* HydLa [#n6644e92]
- 制約階層を用いることで、制約に優先順位を設けることが可能
- 実数領域上の変数についての時相論理式による制約の記述
- 数学や論理学の記法を用いた簡潔な記述
''Hyrose'', which is an implementation of HydLa, has been developed using C++ and
uses Mathematica and REDUCE as an external constraint solver.  The features of
Hyrose are:
- error-free simulatation using symbolic computation,
- simulation of system with symbolic parameters and uncertainties, and
- search for all solution trajectories using non-deterministic execution.


- 数式処理を用いて、記述されたモデルシミュレーションを誤差なく行う
- モデルの許すすべての解を、非決定実行によって求められる
We are also developing ''HIDE'', an integrated development environment for HydLa.
HIDE allows us to model, simulate and visualize models within a unified environment.