A graphical query language for entity-relationship databases
Proc. of the third international conference on Entity-relationship approach to software engineering
A framework for choosing a database query language
ACM Computing Surveys (CSUR)
Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
Automatic graph drawing and readability of diagrams
IEEE Transactions on Systems, Man and Cybernetics
A generalized transitive closure for relational queries
Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
The entity-relationship model—toward a unified view of data
ACM Transactions on Database Systems (TODS) - Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
Universality of data retrieval languages
POPL '79 Proceedings of the 6th ACM SIGACT-SIGPLAN symposium on Principles of programming languages
Artificial Intelligence Applications for Business
Artificial Intelligence Applications for Business
The Design and Analysis of Computer Algorithms
The Design and Analysis of Computer Algorithms
GUIDE: Graphical User Interface for Database Exploration
VLDB '82 Proceedings of the 8th International Conference on Very Large Data Bases
GORDAS: A Formal High-Level Query Language for the Entity-Relationship Model
ER '81 Proceedings of the Second International Conference on the Entity-Relationship Approach to Information Modeling and Analysis
The ER and EAS Formalisms for System Modelling, and the EAS-E Language
ER '81 Proceedings of the Second International Conference on the Entity-Relationship Approach to Information Modeling and Analysis
A Graphical Query Facility for ER Databases
Proceedings of the Fourth International Conference on Entity-Relationship Approach
An Approach to Computation Specification for an Entity-Relationship Query Language
Proceedings of the Sixth International Conference on Entity-Relationship Approach
Query-by-example: a data base language
IBM Systems Journal
WDBQS: A Unified Access to Distant Databases Via a Simple Web-Tool
DEXA '00 Proceedings of the 11th International Conference on Database and Expert Systems Applications
Query Reification Based Approach for Object-Oriented Query Formulation Aid
ICTAI '99 Proceedings of the 11th IEEE International Conference on Tools with Artificial Intelligence
Ontology based graphical query language supporting recursion
KES'10 Proceedings of the 14th international conference on Knowledge-based and intelligent information and engineering systems: Part I
The use of the data dictionary in DBMS based on graphs
Interfaces'96 Proceedings of the 1996 international conference on Interfaces to Databases
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The need of a friendly man-machine interaction is becoming crucial for a large variety of applications, in particular, those requiring frequent extraction of information from the database. Experience suggests that traditional query languages are not friendly enough for the causal user: s/he is requested to formulate queries in a textural language, without any iconic or spatial clues to help the querying process. A new generation of languages (visual languages) has been recently investigated, that attempts to make extensive use of the person's instincts and senses. In this paper we propose a fully visual system, called Query by Diagram^* (QBD^*), which is based on a conceptual data model, a query language defined on this model and a graphical user interface. The main characteristics of the interface are the ease of use, and the availability of a rich set of primitives for both schema selection and query formulation. Unlike many present proposals of graphical query systems, graphical operations are formally defined from both a syntactic and a semantic point of view.