Keyphrases
- access control
- xml documents
- fine grained
- data security
- xml data
- security policies
- xml queries
- dynamic access control
- xml databases
- xml schema
- tree structure
- security mechanisms
- access control models
- access control policies
- relational databases
- xpath queries
- structured data
- identity management
- security model
- role based access control
- data model
- security architecture
- access control systems
- security requirements
- intrusion detection
- role assignment
- usage control
- sql queries