Specification and verification for semi-structured data

Tree logic, inherited from ambient logic, is introduced as the formal foundation of related programming language and type systems. In this paper, we introduce recursion into such logic system, which can describe the tree data more clearly and concisely. By making a distinction between proposition and predicate, a concise semantics interpretation for our modal logic is given. We also develop a model checking algorithm for the logic without δ operator. The correctness of the algorithm is shown. Such work can be seen as the basis of the semi-structured data processing language and more flexible type system. Foundation item: Supported by the National Natural Sciences Foundation of China (60233010, 60273034, 60403014), 863 Program of China (2002 AA116010), 973 Program of China (2002CB312002) Biography: CHEN Tao-lue (1980-), male, Master, research direction: formal method, mobile computation.