FSL,an undomain representation tool based on frame,has been completed at micro-computer. FSL is applied to control scheduling. In this paper,the principle and composition of FSL is recounted in detail and the characteristics of FSL is analysed.

• FSL是作者在微机上实现的一种与领域无关的基于框架的表示工具，它适用于控制调度，该文叙述了FSL的组成及工作原理，并对FSL的特性进行了分析。