An authorization mechanism for a relational database system
ACM Transactions on Database Systems (TODS)
Computers and Privacy: A Survey
ACM Computing Surveys (CSUR)
A lattice model of secure information flow
Communications of the ACM
Implementation of a structured English query language
Communications of the ACM
Specifying queries as relational expressions: the SQUARE data sublanguage
Communications of the ACM
On the implementation of security measures in information systems
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
HYDRA: the kernel of a multiprocessor operating system
Communications of the ACM
Data base security: requirements, policies, and models
IBM Systems Journal
An overview of recent data base research
ACM SIGMIS Database
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In the three-level approach to data description, the conceptual or information level is supposed to provide a data independent model of the enterprise's information. It may be useful to examine the conceptual model in this liqht primarily, rather than ...