001 package org.hackystat.telemetry.analyzer.language.ast; 002 003 /** 004 * The interface for expression in telemetry language. Expression participates in arithmetic 005 * operation and function calls to form more complex expression. 006 * <p> 007 * This is a tag interface, there is no method to implement. 008 * 009 * @author (Cedric) Qin ZHANG 010 * @version $Id$ 011 */ 012 public interface Expression { 013 }