Developing Apama Applications > Apama EPL Reference > Expressions > Primary expressions
Primary expressions
The primary expression is the simplest form of expression. It can take the following forms:
PrimaryExp
Identifiers in expressions
In an expression, an identifier is a variable name, an instance method name, a type method name, or an action name.
Literals in expressions
A literal in an expression is a compile-time constant value as described in Literals.
ParenthesizedExpression
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