Disclosed are a modified polyvinyl acetal resin consisting essentially of repeating units represented by the following formula, and a modifier for curable resins which comprises the modified polyvinyl acetal resin: . PVC sheets and composites are compostable in landfills. This interpretation dynamically determines navigation within, and processing of, the data to be transformed. The first transistor region comprises a PFET; and, the second transistor region comprises an NFET. Further, gate input signals can be wired with only polysilicon wires without crossing each other.