J2EE™ Tutorial, The

Full Syntax

This section discusses the EJB QL syntax, as defined in the Enterprise JavaBeans Specification. Much of the following material paraphrases or directly quotes the specification.

BNF Symbols

Table 8-1 describes the BNF symbols used in this chapter.

Table 8-1. BNF Symbol Summary

Symbol	Description
::=	The element to the left of the symbol is defined by the constructs on the right.
*	The preceding construct may occur zero or more times.
{...}	The constructs within the curly braces are grouped together.
[...]	The constructs within the square brackets are optional.
|	An exclusive OR.
BOLDFACE	A keyword (although capitalized in the BNF diagram, keywords are not case sensitive).
Whitespace	A whitespace character can be a space, horizontal ...