XYZ/E is a temporallogic system as well as a programming language. It can represent almost every kind of significant features in conventional imperative languages.
既是一个时序逻辑系统也是一个程序设计语言，它能表示普通高级语言中几乎所有的重要机制。
2
Using temporallogic and algebra, a formal requirement language was presented and used to describe the formal hierarchy requirements for cryptographic protocols.