Attribute grammars have been used extensively in every phase of traditional compiler construction. Recently, it has been shown that they can also be effectively adopted to handle scheduling algorithms in high-level synthesis. Their main advantages are modularity and declarative notation in the development of design automation environments. In this paper, past results are further elaborated and more scheduling techniques are presented and implemented in a flexible environment for the design automation of digital systems. This novel approach can be proven valuable for fast evaluation of new algorithms and techniques in the field.