ViewDS Access Sentinel is an authorization server that centralizes policy processing and management across on-premises and cloud applications. The product implements attribute-based access control (ABAC) using the XACML framework to provide fine-grained authorization decisions. The system processes authorization requests by evaluating multiple factors including user identity, resource attributes, and contextual information such as time and location. Access Sentinel provides a centralized view of authorization policies across an organization's infrastructure, which can be used for policy maintenance, application integration, and compliance auditing. The product includes an intuitive user interface for creating policy definitions without coding, using a consistent format across all applications and services. It supports rapid application integration through pre-built Policy Enforcement Points and developer integration kits. The architecture includes native XML support for processing XACML policies. Access Sentinel is designed to support zero trust security models by enabling least-privilege access controls at various levels of granularity. The system can be deployed for enterprise-wide authorization management or integrated into vendor service offerings.