Title :
The user´s view level of the GOQL graphical query language
Author :
Keramopoulos, Euclid ; Pouyioutas, Philippos ; Ptohos, Tasos
Author_Institution :
Sch. of Inf. & MT, Univ. of North London, UK
Abstract :
The paper addresses issues related to the design of a graphical query mechanism that can act as an interface to any object-oriented database system (OODBS), in general, and the object model of ODMG 2.0, in particular. In the paper a brief literature survey of related work is given, and an analysis methodology that allows the evaluation of such languages is proposed. Moreover, the user´s view level of a new graphical query language, namely GOQL (Graphical Object Query Language), for ODMG 2.0 is presented. The user´s view level provides a graphical schema that does not contain any of the perplexing details of an object-oriented database schema, and it also provides a foundation for a graphical interface that can support ad-hoc queries for object-oriented database applications. We illustrate, using an example, the user´s view level of GOQL
Keywords :
graphical user interfaces; object-oriented databases; query languages; visual languages; GOQL graphical query language; Graphical Object Query Language; ODMG 2.0; ad-hoc queries; graphical interface; graphical schema; object model; object-oriented database system interface; user´s view level; Computer languages; Data structures; Database languages; Database systems; Electrical capacitance tomography; Electronic switching systems; Informatics; Object oriented databases; Object oriented modeling; Spatial databases;
Conference_Titel :
Information Visualization, 1999. Proceedings. 1999 IEEE International Conference on
Conference_Location :
London
Print_ISBN :
0-7695-0210-5
DOI :
10.1109/IV.1999.781540
