Support for modeling relationships in object-oriented databases
Modeling real-world applications typically consists of two parts: the representations of entities of interest, and the representations of relationships...
Cardinality constraints in semantic data models
Constraints are central to the notion of a semantic data model. How well a model captures constraints affects its...
Incoherence and subsumption for recursive views and queries in object-oriented data models
Object-oriented data models are being extended with recursion to gain expressive power. This complicates both the incoherence detection problem...
Extending OMT to support bottom-up design modelling in a heterogeneous distributed database environment
We present an extension to the object model of OMT to cope with bottom-up database design. By investigation, it...
Relationship of relationships and other inter-relationship links in E-R model
The concept of relationship has hitherto been defined as an association between entities. This definition is too restrictive and...
GRAQULA: A graphical query language for entity-relationship or relational databases
GRAQULA is a graphical language for querying and updating a database. One version of GRAQULA provides a user interface...
An entity-based approach to query processing in relational databases
An entity-based query interface to relational databases is developed. The interface combines some objectoriented features with the strengths of...
Extending ERD modeling notation to fuzzy management of GIS data files
Geographic information systems manage a wide variety of data. Some of these data are stored in traditional databases, but much...
Efficient data retrieval and manipulation using Boolean entity lattice
This paper proposes a technique to organize the database such that retrievals and manipulations will be operated on a...
An ontology based approach to the integration of entity–relationship schemas
In schema integration, schematic discrepancies occur when data in one database correspond to metadata in another. We explicitly declare...
