A data model and query language for EXODUS
SIGMOD '88 Proceedings of the 1988 ACM SIGMOD international conference on Management of data
Identity, equality and query optimization
Lecture notes in computer science on Advances in object-oriented database systems
A model of queries for object-oriented databases
VLDB '89 Proceedings of the 15th international conference on Very large data bases
OQL: a query language for manipulating object-oriented databases
VLDB '89 Proceedings of the 15th international conference on Very large data bases
Queries and views in an object-oriented data model
Proceedings of the second international workshop on Database programming languages
Algebraic support for complex objects with arrays, identity, and inheritance
SIGMOD '91 Proceedings of the 1991 ACM SIGMOD international conference on Management of data
SIGMOD '91 Proceedings of the 1991 ACM SIGMOD international conference on Management of data
Querying object-oriented databases
SIGMOD '92 Proceedings of the 1992 ACM SIGMOD international conference on Management of data
Schema transformation without database reorganization
ACM SIGMOD Record
Type derivation using the projection operation
Information Systems - Special issue on extending database technology
EDBT '94 Proceedings of the 4th international conference on extending database technology: Advances in database technology
Closure maintenance in an object-oriented query model
CIKM '94 Proceedings of the third international conference on Information and knowledge management
An axiomatic model of dynamic schema evolution in objectbase systems
ACM Transactions on Database Systems (TODS)
A model for compound type changes encountered in schema evolution
ACM Transactions on Database Systems (TODS)
Object Database Standard: ODMG-93
Object Database Standard: ODMG-93
Object-Oriented Databases: Definition and Research Directions
IEEE Transactions on Knowledge and Data Engineering
Object-Oriented Query Languages: The Notion and the Issues
IEEE Transactions on Knowledge and Data Engineering
A Transparent Schema-Evolution System Based on Object-Oriented View Technology
IEEE Transactions on Knowledge and Data Engineering
A View Mechanism for Object-Oriented Databases
EDBT '92 Proceedings of the 3rd International Conference on Extending Database Technology: Advances in Database Technology
ViewSystem: Integrating Heterogeneous Information Bases by Object-Oriented Views
Proceedings of the Sixth International Conference on Data Engineering
Object Views: Extending the Vision
Proceedings of the Sixth International Conference on Data Engineering
A Query Algebra for Object-Oriented Databases
Proceedings of the Sixth International Conference on Data Engineering
A Query Model for Object-Oriented Databases
Proceedings of the Ninth International Conference on Data Engineering
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
Multiview: A Methodology for Supporting Multiple Views in Object-Oriented Databases
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
Deferred Incremental Refresh of XML Materialized Views
CAiSE '02 Proceedings of the 14th International Conference on Advanced Information Systems Engineering
Unified Class Evolution by Object-Oriented Views
ER '92 Proceedings of the 11th International Conference on the Entity-Relationship Approach: Entity-Relationship Approach
Managing Schema Evolution Using a Temporal Object Model
ER '97 Proceedings of the 16th International Conference on Conceptual Modeling
Queries in Object-Oriented Database Systems
CIKM '92 Selected Papers from the First International Conference on Information and Knowledge Management, Expanding the Definition of Database
Incremental Maintenance of Schema-Restructuring Views
EDBT '02 Proceedings of the 8th International Conference on Extending Database Technology: Advances in Database Technology
XEM: Managing the Evolution of XML Documents
RIDE '01 Proceedings of the 11th International Workshop on research Issues in Data Engineering
Achieving adaptivity for OLAP-XML federations
DOLAP '03 Proceedings of the 6th ACM international workshop on Data warehousing and OLAP
Data management research at the Middle East Technical University
ACM SIGMOD Record
WI '06 Proceedings of the 2006 IEEE/WIC/ACM International Conference on Web Intelligence
XML materialized views and schema evolution in VIREX
Information Sciences: an International Journal
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Extensibility and dynamic schema evolution are among the attractive features that lead to the wide acceptance of the object-oriented paradigm. Not knowing all class hierarchy details should not prevent a user from introducing new classes when necessary. Naive or professional users may define new classes either by using class definition constructs or as views. However, improper placement of such classes leads to a flat hierarchy with many things duplicated. To overcome this problem, we automated the process in order to help the user find the most appropriate position with respect to her class in the hierarchy regardless of her knowledge of the hierarchy. The system must be responsible for the proper placement of new classes because only the system has complete knowledge of the details of the class hierarchy, especially in a dynamic environment where changes are very frequent. In other published work, we proved that to define a view it is enough to have the set of objects that qualify to be in a view in addition to having message expressions (possible paths) that lead to desired values within those objects. Here, we go further to map a view that is intended to be persistent into a class. Then we investigate the proper position of that class in the hierarchy. To achieve this, we consider current characteristics of a new class in order to derive its relationship with other existing classes in the hierarchy. Another advantage of the presented model is that views that generate new objects are still updatable simply because we based the creation of new objects on existing identities. In other words, an object participates inside view objects by its identity regardless of which particular values from that object are of interest to the view. Values are reachable via message expressions, not violating encapsulation. This way, actual values are present in only one place and can be updated.