Abstract: This paper proposed a reflective software architecture supporting the reuse of architectural level designs, and described the PMB protocols used to complete interaction and interoperation between metes level architecture and base level architecture of the reflective software architecture. Finally,it formalized the PMB protocols using the formal specification language,Object Z language.

Key words: Reuse of software architecture,Reflective software architecture,Metes-1evel,Base1evel,PMB protocols