Abstract
XML (eXtensible Markup Language) is becoming the most relevant standardization effort in the area of document representation through markup languages. The existing access control has problems that an access control technique becomes complicated for each operation as a new operation is added. In this paper, we present an action type of access control model. We also propose use a tree labeling algorithm for transformation processor of XML documents. What is therefore expected is higher efficiency than that of the existing assess control by managing users.