GACL - a Grid ACL manipulation library
GACL 是一个 C 语言程序库，用来操作 Grid 访问控制列表，Grid ACL 基于 XML 的访问控制语言。
The aim of GACL is to insulate application authors from changes in ACL format and to provide easy access to ACL information (ie to remove the need for every application to know how to parse XML and evaluate ACL’s.)
