Introduction

In this chapter, we present the EYEDB Object Query Language which supports the EYEDB object model. It is based on the ODMG 2.0 Object Query Language OQL.

We first describe the design principles of the language in Section 2, then we present in Section 3 the main differences between EYEDB OQL and ODMG OQL. The language concepts are presented in Section 4. In Section 5, we introduced the language syntax. A quick reference manual of OQL is given in Section 6.

In this chapter, OQL denotes the EYEDB Object Query Language while the standard ODMG 2.0 Object Query Language will be denoted as ODMG OQL.