The EL component of the Apache Commons subproject provides an implementation of the JavaServer Pages (JSP) 2.0 Expression Language interpreter.

The JSP 2.0 specification provides a portable API for evaluating "EL Expressions": The classes and interfaces in the javax.servlet.jsp.el package describe and define programmatic access to the Expression Language evaluator.

The org.apache.commons.el and org.apache.commons.el.parser packages provide an implementation of this API.