ITU-T X.1144
(Pre-Published) eXtensible Access Control Markup Language (XACML) 3.1
standard by International Telecommunication Union-T , 04/01/2024
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This Recommendation defines the eXtensible Access Control Markup Language (XACML) Version 3.1. It defines a common language for expressing security policy. The motivation behind XACML is to develop an XML based policy language that can be used:
– To provide a method for flexible definition of the procedure by which rules and policies are combined.
– To provide a method for dealing with multiple subjects acting in different capacities.
– To provide a method for basing an authorization decision on attributes of the subject and resource.
– To provide a method for dealing with multi-valued attributes.
– To provide a method for basing an authorization decision on the contents of an information resource.
– To provide a set of logical and mathematical operators on attributes of the subject, resource and environment.
– To provide a method for handling a distributed set of policy components, while abstracting the method for locating, retrieving and authenticating the policy components.
– To provide a method for rapidly identifying the policy that applies to a given action, based upon the values of attributes of the subject, resource and action.
– To provide an abstraction-layer that insulates the policy-writer from the details of the application environment.
– To provide a method for specifying a set of actions that must be performed in conjunction with policy enforcement.
The core XACML solutions are included in this Recommendation. Clause 7 develops XACML models. Clause 8 develops policy language. Clause 10 develops policy processing rules. Clause 11 develops guidelines for implementers.
