Abstract
The non-functional requirements of the software system usually cross the whole system, and the object-oriented software development method can lead to the entanglement and dispersion of the code. ASECT-Z proposed a formal method for non-functional requirements, it is the formal specification for the extension of Z language. The language based on set theory and mathematical logic, with strict logic, and the formal specification of reasoning. In this paper, we describe a library management system based on Aspect-Z, and then give a formal proof of the formal specification for formal verification.
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