XACL

XML Access Control LanguageXACL is used to specify an object-subject-action-condition oriented policy in the context of a particular XML document. The notion of subject comprises identity, group, and role. The granularity of object can be as fine as the one of XML nodes within the document though the current version is restricted to elements and attributes. Currently, there are four possible actions (read, write, create and delete), but the structure of the language is not limited to these.(Definition adapted from the original specification document)

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