Bug 122254 Not Like operator is missing in the Filter tab of Data Set window
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
/**
	 * current report element created by visitor
	 */
	protected Object currentElement;
	/**
	 * default unit used by this report
	 */
	protected String defaultUnit;
	/**
	 * Factory IR created by this visitor
	 */
	protected Report report;
	/**
	 * report design handle
	 */
	protected ReportDesignHandle handle;
	/**
	 * the CSSEngine
	 */
	protected CSSEngine cssEngine;
	/**
	 * the inheritable report style
	 */
	StyleDeclaration nonInheritableReportStyle;
	/**
	 * the non-inheritable report style
	 */
	StyleDeclaration inheritableReportStyle;
	/**
	 * constructor