Add to ORKGWe propose a DBMS the data model of which is an extension of the Entity-Relationship model of Chen. The main extensions include the specialization and generalization concepts of Smith & Smith and the possibility to define relationships between relationships. In addition we extend the concept of a role in a relationship, to a multi-valued role which enables to associate a set of tuples performing the same function in a relationship. A query language has been designed in order to deal with the enhanced semantic capabilities of the data model supported by the ECRINS/86 system
At present, the Entity-Relationship (ER) model is the most important paradigm for conceptual databas...
Database Management Systems (DBMSs) support the creation and modification of databases containing po...
The recent spurt of research activities in Entity-Relationship Approach to databases calls for a clo...
We propose a DBMS the data model of which is an extension of the Entity-Relationship model of Chen. ...
A data model, called the entity-relationship model, is proposed. This model incorporates some of the...
This book is a comprehensive presentation of entity-relationship (ER) modeling with regard to an int...
This paper suggests that more powerful data base systems (DBMS) can be built by supporting data base...
Database theory is now in a mature state, and this book addresses important extensions of the relati...
In this paper, we bring together two important topics of current database research: enhancing the da...
This paper is dedicated to support data modelling in the ESPRIT project CAPISCE (Computer Architectu...
[[abstract]]Entity-relationship (E-R) concepts are extended to capture natural language semantics an...
This work proposes a comprehensive querying database system based on an enhanced entity relationship...
Abstract. We study a metamodel for the Entity Relationship (ER) and the Relational data model. We do...
It is extremely difficult to compare and combine the modeling capabilities of the various database m...
Abstract. A metamodel provides an abstract syntax to distinguish between valid and invalid models. T...
At present, the Entity-Relationship (ER) model is the most important paradigm for conceptual databas...
Database Management Systems (DBMSs) support the creation and modification of databases containing po...
The recent spurt of research activities in Entity-Relationship Approach to databases calls for a clo...
We propose a DBMS the data model of which is an extension of the Entity-Relationship model of Chen. ...
A data model, called the entity-relationship model, is proposed. This model incorporates some of the...
This book is a comprehensive presentation of entity-relationship (ER) modeling with regard to an int...
This paper suggests that more powerful data base systems (DBMS) can be built by supporting data base...
Database theory is now in a mature state, and this book addresses important extensions of the relati...
In this paper, we bring together two important topics of current database research: enhancing the da...
This paper is dedicated to support data modelling in the ESPRIT project CAPISCE (Computer Architectu...
[[abstract]]Entity-relationship (E-R) concepts are extended to capture natural language semantics an...
This work proposes a comprehensive querying database system based on an enhanced entity relationship...
Abstract. We study a metamodel for the Entity Relationship (ER) and the Relational data model. We do...
It is extremely difficult to compare and combine the modeling capabilities of the various database m...
Abstract. A metamodel provides an abstract syntax to distinguish between valid and invalid models. T...
At present, the Entity-Relationship (ER) model is the most important paradigm for conceptual databas...
Database Management Systems (DBMSs) support the creation and modification of databases containing po...
The recent spurt of research activities in Entity-Relationship Approach to databases calls for a clo...