The Format Model: A Theory of database Organization
Journal of the ACM (JACM)
On compiling queries in recursive first-order databases
Journal of the ACM (JACM)
Non first normal form relations: An algebra allowing data restructuring
Journal of Computer and System Sciences
The logical data model: a new approach to database logic
The logical data model: a new approach to database logic
A calculus for complex objects
PODS '86 Proceedings of the fifth ACM SIGACT-SIGMOD symposium on Principles of database systems
An amateur's introduction to recursive query processing strategies
SIGMOD '86 Proceedings of the 1986 ACM SIGMOD international conference on Management of data
Sets and negation in a logic data base language (LDL1)
PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
ACM Transactions on Database Systems (TODS)
Semantic database modeling: survey, applications, and research issues
ACM Computing Surveys (CSUR)
On the complexity of queries in the logical data model
Lecture notes in computer science on ICDT '88
ACM Computing Surveys (CSUR)
F-logic: a higher-order language for reasoning about objects, inheritance, and scheme
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Object identity as a query language primitive
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Journal of Computer and System Sciences
A rule-based language with functions and sets
ACM Transactions on Database Systems (TODS)
Object-oriented database systems
Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On the expressive power of the logical data model: prelimiary report
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
The functional data model and the data languages DAPLEX
ACM Transactions on Database Systems (TODS)
Database description with SDM: a semantic database model
ACM Transactions on Database Systems (TODS)
On the correct translation of update operations on relational views
ACM Transactions on Database Systems (TODS)
Implementation of logiclal query languages for databases (abstract only)
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
Database abstractions: aggregation and generalization
ACM Transactions on Database Systems (TODS)
Journal of the ACM (JACM)
A normal form for nested relations
PODS '85 Proceedings of the fourth ACM SIGACT-SIGMOD symposium on Principles of database systems
A relational model of data for large shared data banks
Communications of the ACM
LSL: a Link and Selector Language
SIGMOD '76 Proceedings of the 1976 ACM SIGMOD international conference on Management of data
An algebra of quotient relations
SIGMOD '77 Proceedings of the 1977 ACM SIGMOD international conference on Management of data
Principles of Database Systems
Principles of Database Systems
Universality of data retrieval languages
POPL '79 Proceedings of the 6th ACM SIGACT-SIGPLAN symposium on Principles of programming languages
Data Models
CQLF---a query language for CODASYL-type databases
SIGMOD '82 Proceedings of the 1982 ACM SIGMOD international conference on Management of data
A new approach to database logic
PODS '84 Proceedings of the 3rd ACM SIGACT-SIGMOD symposium on Principles of database systems
Remarks on the algebra of non first normal form relations
PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
Semantics of Network Data Manipulation Languages: An Object-Oriented Approach
VLDB '82 Proceedings of the 8th International Conference on Very Large Data Bases
Data Structures for an Integrated Data Base Management and Information Retrieval System
VLDB '82 Proceedings of the 8th International Conference on Very Large Data Bases
Extended Algebra and Calculus for ~1NF Relational Databases
Extended Algebra and Calculus for ~1NF Relational Databases
Perspectives on database theory
ACM SIGACT News
On the completeness of object-creating database transformation languages
Journal of the ACM (JACM)
Object identity as a query language primitive
Journal of the ACM (JACM)
PODS '00 Proceedings of the nineteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Correspondence and translation for heterogeneous data
Theoretical Computer Science
Typing Graph-Manipulation Operations
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Data Models for Metrics-Based Project Management Systems
COMPSAC '96 Proceedings of the 20th Conference on Computer Software and Applications
Algebraic equivalences of nested relational operators
Information Systems
On the complexity of nonrecursive XQuery and functional query languages on complex values
ACM Transactions on Database Systems (TODS)
Survey of graph database models
ACM Computing Surveys (CSUR)
Incomplete information and certain answers in general data models
Proceedings of the thirtieth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Querying RDF data from a graph database perspective
ESWC'05 Proceedings of the Second European conference on The Semantic Web: research and Applications
Foundations of rule-based query answering
RW'07 Proceedings of the Third international summer school conference on Reasoning Web
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We propose an object-oriented data model that generalizes the relational, hierarchical, and network models. A database scheme in this model is a directed graph, whose leaves represent data and whose internal nodes represent connections among the data. Instances are constructed from objects, which have separate names and values. We define a logic for the model, and describe a nonprocedural query language that is based on the logic. We also describe an algebraic query language and show that it is equivalent to the logical language.